Bedroom Lighting Calculator

Layer ambient, bedside, and wardrobe lighting for any bedroom size.

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Kitchen Lighting Calculator

Full layered plan — ambient ceiling, under-cabinet, and island pendants.

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Living Room Lighting Calculator

Ambient, accent, and task lighting for any living room layout.

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Bathroom Lighting Calculator

Vanity, shower, and ambient lighting for any bathroom size.

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Stair Lighting Calculator

Riser lights, sconces, and LED strip for any staircase.

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Cove Lighting Calculator

LED strip output and lip height check for cove and valance lighting.

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Under-Cabinet Lighting

Lumens per foot and total output for worktop LED strips.

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Home Theater Bias Lighting

SMPTE-compliant bias lighting for any screen size and room.

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Ceiling Fan Light Kit Checker

Check if your bulbs are safe and find the right LED upgrade.

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Dimmer Load Calculator

Check if your dimmer handles your LED load without flickering.

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Color Temperature Guide

Choose the right CCT for every room — 2700K vs 3000K vs 4000K.

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Natural vs Artificial Light Balance

Balance window daylight with artificial lighting in any room.

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Recessed Lighting Layout

Grid spacing and fixture count for any room — the can light calculator.

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Chandelier Size Calculator

Right chandelier diameter and hang height for any dining room or foyer.

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Pendant Light Height

Ideal drop height for pendants over kitchen islands and dining tables.

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Room Lumens Calculator

Total lumens needed for any room — bedroom, kitchen, living room.

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Hallway Lighting Calculator

Lumen needs and fixture spacing for hallways and stairwell landings.

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Picture Light Placement

Ideal picture light size and mounting height for any artwork or wall display.

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How Bright Should Kitchen Lights Be?

Recommended lumen levels for kitchen ambient, task, and under-cabinet.

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How Many Lumens for a Garage?

Calculate the right lumen output and fixture count for any garage size.

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What Size Chandelier for a Dining Room?

Find the ideal chandelier diameter and hang height for any dining table.

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How Many Recessed Lights Do I Need?

Calculate how many recessed lights based on room size and ceiling height.

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Ceiling Fixture Size

Find the right fixture diameter for any room — flush mount, fan, or chandelier.

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Bedroom Lighting

Layer ambient, bedside, and accent lighting for any bedroom size.

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Room Lumens Calculator

How much light does any room need? Enter dimensions and room type.

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Recessed Lighting Layout

Calculate how many recessed lights you need and where to place them.

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Fixture Count Estimator

IES lumen method fixture count for single and multi-zone spaces with grid layout.

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Mounting Height Optimizer

Optimal fixture height for RCR, spacing:height ratio, and uniformity.

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LED vs Incandescent Savings

Calculate energy and cost savings from switching to LED.

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Lighting Electricity Cost

See exactly what your lights cost per day, month, and year.

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LED Payback Period

How long until LED upgrades pay for themselves?

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IES File Reader

Upload and visualise IES photometric files from any luminaire.

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Lighting Units Mega-Converter

Convert between all lighting units in one place.

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Lighting Power Density (LPD)

Calculate W/m² LPD and check against ASHRAE 90.1 limits.

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Fixture Configuration Builder

Complete LED specification with BOM, energy analysis, and layout plan.

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Chandelier Size Calculator

Find the right chandelier diameter for any dining room, living room, or foyer.

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Pendant Light Height

Ideal hang height for kitchen islands, dining tables, and bedrooms.

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Vanity Light Size Calculator

Right fixture width and mount height for any bathroom vanity.

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Kitchen Lighting Calculator

Full layered kitchen lighting plan including under-cabinet and island.

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Bedroom Lighting Calculator

Layer ambient, bedside, and wardrobe lighting for any bedroom.

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Stair Lighting Calculator

Riser lights, sconces, and LED strip for any staircase.

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Cove Lighting Calculator

LED strip lumen output and lip height check for cove lighting.

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Ceiling Fixture Size Calculator

Right fixture diameter and type for any room and ceiling height.

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Home Theater Bias Lighting

SMPTE-compliant bias lighting for any screen size and room.

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Under-Cabinet Lighting

Lumens per foot and total output for under-cabinet LED strips.

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Ceiling Fan Light Kit Checker

Check if your bulbs are safe and find the right LED upgrade.

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Dimmer Load Calculator

Check if your dimmer can handle your LED load.

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Color Temperature Guide

Choose the right CCT for every room and application.

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Natural vs Artificial Light Balance

Balance daylight and artificial lighting in any room.

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Up/Down Light Ratio Calculator

Calculate task and ceiling illuminance from any direct/indirect ratio.

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Wall Wash Lighting Calculator

Spacing, throw distance, and scalloping check for wall washing and grazing.

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Office Lighting Calculator

EN 12464-1 compliant office lighting with UGR check.

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Warehouse Lighting Calculator

High bay LED layout and lux for any warehouse.

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Retail Lighting Calculator

Accent and ambient lighting design for retail and showrooms.

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Restaurant Lighting Calculator

Layered lighting design for dining rooms, bars, and cafes.

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Hospital and Medical Lighting

Clinical lighting levels for wards, theatres, and reception.

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School and Classroom Lighting

Lighting for classrooms, labs, and school common areas.

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Hotel Lobby Lighting

Layered lighting for any hotel star rating and lobby size.

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Car Showroom Lighting

Display and accent lighting for automotive showrooms.

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Data Centre Lighting

Tier I-IV data centre lighting with PUE impact calculation.

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Cleanroom Lighting Calculator

ISO 14644-1 compliant lighting for any cleanroom classification.

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Emergency Egress Lighting

Emergency lighting compliance for escape routes and open areas.

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Warehouse Foot-Candle Calculator

How many foot-candles does a warehouse need? Sizing per IESNA RP-7.

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Exit Sign Coverage Calculator

Exit sign placement and max viewing distance per NFPA 101 and IBC.

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Hospital Lighting Calculator

Fixture sizing for any healthcare space per IESNA RP-29.

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Corridor Lighting Calculator

Fixtures and LPD for corridors per ASHRAE 90.1.

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Classroom Lighting Calculator

Design classroom lighting to IESNA RP-3 and WELL standards.

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Emergency Lighting Calculator

Size emergency lighting fixtures and battery backup for any space.

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Low Bay Lighting Calculator

Calculate low bay fixture count and spacing for ceilings under 20ft.

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Cold Storage Lighting Calculator

LED fixture sizing for freezers, cold rooms, and refrigerated warehouses.

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Explosion Proof Lighting Calculator

Size hazardous location lighting for Class I/II/III environments.

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High Bay Spacing Calculator

Optimal high bay fixture spacing for uniform illumination.

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Voltage Drop Calculator

Calculate voltage drop over cable runs for LED and luminaire circuits.

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Circuit Load Calculator

Total wattage and circuit breaker sizing for lighting installations.

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Wire Gauge Calculator

Correct cable cross-section for any lighting circuit and length.

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LED Driver Calculator

Size constant-current and constant-voltage drivers for any LED load.

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Constant Current Driver

Design constant-current driver circuits for series LED strings.

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Constant Voltage LED Strip

Power supply sizing and voltage drop for 12V and 24V LED strip.

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LED Load Calculator

Total LED array wattage and current for multi-fixture installations.

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Power Supply Sizing

Size an LED power supply with correct headroom and derating.

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Battery Runtime Calculator

Runtime for battery-powered LED fixtures and emergency lights.

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Solar Lighting Runtime

Solar panel and battery sizing for off-grid LED lighting.

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Dimmer Compatibility Calculator

Check LED dimmer compatibility and minimum load requirements.

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Smart Lighting Savings

Energy savings from occupancy sensors and smart lighting controls.

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Occupancy Sensor Savings

Savings from adding PIR or microwave occupancy sensing.

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Carbon Footprint Calculator

Annual CO₂ emissions from your lighting installation.

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Daylight Harvesting Savings

Energy savings from daylight-linked dimming controls.

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Utility Rebate Estimator

Estimate utility rebates for LED retrofit projects.

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Solar Lighting ROI

Return on investment for solar-powered outdoor lighting.

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Lighting Upgrade NPV

Net present value analysis for commercial LED upgrade projects.

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Emergency Lighting Compliance

BS 5266 and EN 1838 emergency lighting compliance checker.

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Transformer Sizing Calculator

Size a lighting transformer for 12V or 24V installations.

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Lighting Control Zone

DALI and 0-10V control zone planning for commercial projects.

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Panel Schedule Calculator

Lighting branch circuit panel schedule with load balancing.

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Thermal Load From Lighting

ASHRAE heat gain from lighting — BTU/hr, tons, and cooling cost.

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LED Wattage Calculator

Calculate total LED wattage for any lighting project or circuit.

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LED vs Halogen Savings Calculator

Energy and replacement cost savings switching from halogen to LED.

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L70 LED Lifetime Calculator

Calculate when LEDs reach 70% lumen output per IES TM-21 depreciation.

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Linear Fixture Driver Loading

Drivers needed, max run, and voltage drop for LED strip and trunking.

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Short Circuit Current

Prospective short circuit current for lighting panel design.

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Junction Box Fill Calculator

NEC and BS 7671 junction box fill for lighting wiring.

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Solar Lighting Runtime Calculator

Solar LED runtime from panel wattage, battery capacity, and usage hours.

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PPFD Grow Light Calculator

Photosynthetic photon flux density for any grow space.

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DLI Calculator

Daily light integral for any plant species and grow setup.

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Grow Tent Sizing

Wattage and PPFD coverage for any grow tent size.

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Greenhouse Lighting

Supplemental lighting for greenhouses by crop and season.

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COB vs Quantum Board

Compare COB and quantum board LED grow lights for any space.

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Grow Light Heat Output

Heat load and ventilation requirements from grow lights.

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Plant Stage Light Hours

Light hours for seedling, veg, and flower stages by species.

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Beam Angle Calculator

Coverage diameter from any fixture beam angle and throw distance.

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DMX Address Calculator

DMX 512 start address and channel mapping for any fixture count.

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Stage Wash Coverage

Coverage area and overlap for stage wash fixtures.

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Gobo Projection Calculator

Gobo image size and focus distance for any throw ratio.

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Moving Head Pan/Tilt

Pan and tilt angles for moving head fixtures to any stage position.

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Studio Lighting Ratio Calculator

Calculate key-to-fill ratios and contrast for photography and film.

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Exposure & Lux Calculator

Convert between EV, lux, foot-candles, and camera settings.

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Softbox Coverage Calculator

Coverage area and softness quality at subject distance for softboxes.

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Street Lighting Calculator

EN 13201 compliant pole spacing, lux, and energy cost per km.

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Parking Lot Lighting

Pole count and lux for open and covered car parks (IES RP-20).

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Parking Area Pole Spacing

Grid layout and pole spacing optimiser for any parking area.

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Pole Height Calculator

Optimal pole height from H:S ratio, target lux, and fixture output.

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Path Light Spacing Calculator

Fixture spacing and count for walkways, gardens, and driveways.

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Security Lighting Calculator

Fixture count, lux, and CCTV compatibility for any security zone.

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Landscape Lighting Calculator

Outdoor landscape lighting for gardens, trees, and architecture.

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String Lights Calculator

String length, socket count, and power for outdoor string lights.

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Outdoor LED Strip

Waterproof LED strip power and driver for outdoor runs.

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Flood Light Coverage

Coverage area and lux from any floodlight at any distance.

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Beam Distribution Selector

Select IESNA Type I-V distribution for road and area lighting.

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Highway Lighting Calculator

Highway and road lighting design to EN 13201 and IESNA RP-8.

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Sports Lighting Calculator

Foot-candles and fixture count for sports fields and outdoor courts.

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Sport Hall Lighting Calculator

Fixture sizing for indoor sport halls, gyms, and multi-use facilities.

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Flood Light Coverage Calculator

Beam diameter and illuminance at grade for flood lights.

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Landscape Lighting (Low Voltage)

Size low-voltage landscape systems, transformer load, and zone wiring.

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Pole Height (S:H Ratio)

Determine optimal pole height from coverage width and S:H ratio.

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Security Lighting (Perimeter)

Perimeter and area security lighting per IES RP-33 with camera check.

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Studio Flash Power Calculator

Flash power for any subject distance and aperture.

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Portrait Lighting Ratio

Key, fill, and ratio for portrait and product photography.

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Video Lighting Calculator

Lux and fixture count for video production and YouTube studios.

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Lighting Gel Calculator

Exposure compensation for colour correction and creative gels.

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Softbox Coverage

Coverage area and light quality from any softbox and distance.

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Exposure Value (EV) Calculator

EV from aperture, shutter speed, and ISO for any setup.

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Hyperfocal Distance

Hyperfocal distance and depth of field for any lens and format.

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CRI and TLCI Calculator

Colour rendering quality check for photography and video lights.

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LED Video Panel Comparison

Compare LED video panels by lux, CRI, and power efficiency.

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White Balance Calculator

Mixed CCT white balance correction for photography and video.

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Green Screen Lighting Calculator

Uniformity, lux, and green spill for chroma key setups.

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Cinematic Lighting Planner

Key/fill/back design with exposure calculation for any camera.

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Candela Distribution Calculator

Analyze candela values and intensity distribution across beam angles.

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Polar Plot Generator

Generate polar intensity diagrams from IES or manual candela data.

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Illuminance Uniformity Calculator

Uniformity ratio and min/max/avg foot-candles for any layout.

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Lux at Distance Calculator

Lux levels at any distance from a point source using inverse square law.

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Throw Distance Calculator

Beam diameter and lux from any fixture at any throw distance.

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UGR Calculator

Unified Glare Rating for any room, fixture, and layout.

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Glare Rating Calculator

Discomfort glare, UGR, and BUG rating for interior and exterior.

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Beam Spread Calculator

Beam diameter, area, and edge lux at any distance and angle.

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Reflector Efficiency

Light output ratio from reflector geometry and reflectance.

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TIR Lens Calculator

TIR lens sizing, focal length, and efficiency for LED optics.

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Optical Loss Calculator

Complete lumen loss budget through every optical element.

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Optic Selection Calculator

Recommended beam angle for any mounting height and target area.

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Circadian Lighting Calculator

Melanopic EDI and WELL L07 compliance for human-centric lighting.

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Heat Sink Calculator for LEDs

Required Rth_sa, minimum heatsink area, and junction temperature.

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L70 Lifetime Calculator

TM-21 lumen maintenance projection from LM-80 test data.

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LED Bin Matching Calculator

MacAdam ellipse uniformity check for LED arrays and fixtures.

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Thermal Derating Calculator

Derated lumen output and current at any operating temperature.

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VPD Calculator for Grow Rooms

Vapour pressure deficit for any temperature and humidity.

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Grow Light Yield Estimator

Estimated yield from grow light output and canopy area.

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Lumens to Lux Converter

Convert lumens to lux for any beam angle and distance.

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Lux to Foot-Candles

Convert lux to foot-candles and foot-candles to lux.

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Candela to Lumens Converter

Convert candela to lumens using beam solid angle.

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Lux to PPFD Converter

Convert lux to PPFD for grow light applications.

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Lumens to Watts Converter

Convert lumens to watts across all bulb and LED types.

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Kelvin Colour Temperature Guide

Visual guide to all CCT values and their lighting applications.

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Foot-Candles to Lux Converter

Convert foot-candles to lux for US to metric projects.

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Lighting Units Mega-Converter

All lighting unit conversions in one calculator.

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White Balance / CCT Converter

Convert between Kelvin, mireds, and white balance presets.

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Watts to Lumens Converter

Convert watts to lumens for LED, CFL, halogen, and incandescent.

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CRI to TM-30 Converter

Convert between CRI Ra and TM-30 Rf/Rg colour rendering metrics.

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Inches to Millimeters Converter

Convert inches to millimeters for lighting fixture dimensions.

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Meter to Feet Converter

Convert meters to feet for room dimensions and mounting heights.

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Percent to Decimal Calculator

Convert percentages to decimals for efficiency and reflectance values.

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Lighting Terminology Finder

Look up definitions for lighting terms, acronyms, and technical jargon.

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