Plan your outdoor LED strip lighting installation. Calculate how many reels, power supplies, and controllers you need — with voltage drop analysis and power injection points for long runs.
Application — sets recommended IP rating
Eaves / soffits
IP65 minimum
Deck / pergola
IP65 minimum
Facade / wall
IP67 recommended
Pathway / steps
IP67 recommended
Pool edge / water
IP68 required
Sign / lettering
IP65 minimum
Strip specification
Controller and dimming
Please enter total strip length.
Total power supply wattage
0W
0
Reels of strip
0
Power supplies needed
0
Power injection points
Installation plan
Voltage drop analysis
Voltage drop exceeding 10% causes visible dimming at the far end of the strip. Inject power at mid-run or use 24V/48V for longer runs.
Total strip length
Strip spec
Total watts (at 100%)
Power supply size (with 20% headroom)
Max run without injection
Total LEDs
Annual electricity (8h/day)
IP rating guide — outdoor LED strips
IP44Splash-proof from any direction. Indoor use or covered outdoor areas only. Not suitable for rain exposure.
IP65Dust-tight and protected against low-pressure water jets. Suitable for eaves, soffits, pergolas, and sheltered outdoor areas.
IP67Fully dust-tight and withstands temporary immersion up to 1m for 30 minutes. Use for facades, steps, and areas exposed to heavy rain.
IP68Fully submersible, rated for continuous immersion beyond 1m. Required for pool edges, underwater lighting, and fountain features.
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The calculators and tools on LightingCalc.lighting are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. LightingCalc.lighting makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.