LED vs halogen cost savings — switching a 50W halogen to a 7W LED saves around $8–12 per bulb per year in electricity. Replace 20 halogens and save $160–240 annually. Most LED upgrades pay back within 6–18 months.
Quick answer: Replacing a 50W halogen with a 7W LED equivalent saves around $8–12 per bulb per year in electricity. Replace 20 halogens in a home and you save $160–240 per year. LED bulbs also last 15–25 times longer — a halogen replaced every 2 years vs an LED lasting 15–25 years. Most LED upgrades pay back in 6–18 months.
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LED vs halogen — head to head comparison
💡 Halogen
50W to produce 600 lumens
$0.80–1.20/yr per bulb electricity (2h/day)
2,000 hours rated life (~3 years at 2h/day)
$3–6 replacement bulb cost
Hot to touch — 90% of energy is heat
Banned in UK/EU since 2021 — no longer sold
CRI 100 — perfect colour rendering
🔆 LED equivalent
7W to produce 600 lumens
$0.11–0.17/yr per bulb electricity (2h/day)
25,000–50,000 hours rated life (25–50 years at 2h/day)
$4–10 upfront cost (once)
Cool or warm — 80–90% of energy is light
Available everywhere — GU10, E27, B22, MR16
CRI 80–95 depending on model
How much do you save switching halogen to LED?
86%
Less electricity per bulb
15–25x
Longer bulb life
6–18 mo
Typical payback period
| Halogen bulb | LED equivalent | Saving per bulb/yr | 10 bulbs/yr saving | Payback |
|---|---|---|---|---|
| 35W GU10 | 4–5W LED GU10 | $5–8 | $50–80 | 6–12 months |
| 50W GU10 | 6–7W LED GU10 | $8–12 | $80–120 | 6–12 months |
| 60W A-shape (BC/ES) | 8–9W LED | $10–14 | $100–140 | 8–14 months |
| 100W A-shape | 12–15W LED | $17–22 | $170–220 | 6–10 months |
| 50W MR16 (12V) | 6–7W LED MR16 | $8–11 | $80–110 | 8–14 months |
| 500W halogen flood | 50–60W LED flood | $85–110 | Per fixture | 3–6 months |
Based on $0.15/kWh electricity rate and 4 hours use per day. Adjust using the calculator for your rate and usage.
Real-world example: a typical home
A typical home has 20–30 halogen downlights and spotlights. Here’s what the switch to LED looks like:
| Before (halogen) | After (LED) | Annual saving |
|---|---|---|
| 20 x 50W GU10 = 1,000W | 20 x 7W LED = 140W | $220–350/yr |
| $3–6 bulb every 2 years | $5–8 bulb every 15 years | $40–80/yr replacement |
| Hot ceiling — AC works harder | Cool ceiling — less AC load | $20–50/yr AC saving |
| Total combined saving | $280–480/yr | |
The hidden saving: Halogen bulbs generate significant heat — 90% of their energy becomes heat, not light. In air-conditioned rooms, your AC system has to remove that heat, adding to your electricity bill. LED’s dramatically lower heat output reduces this secondary cost, typically saving an extra $20–50/year in a typical home.
LED vs halogen — quality and light output
The most common worry about switching to LED is that the light will look different or dimmer. Here’s the reality:
| Property | Halogen | Modern LED | Verdict |
|---|---|---|---|
| Lumens (brightness) | 600lm from 50W | 600lm from 7W | Identical brightness |
| Colour rendering (CRI) | 100 — perfect | 80–95 typical | CRI90+ LED: no visible difference |
| Colour temperature | 2700–3000K warm | Available in any CCT | Match your preference |
| Dimming | Smooth from 0–100% | Good on trailing-edge dimmer | Check compatibility first |
| Instant on | Yes | Yes | No difference |
| Beam angle | Fixed (36–60°) | Wide range available | More choice with LED |
| Heat output | Very hot (fire risk) | Barely warm | LED safer for enclosed fittings |
CRI tip: Cheap LED bulbs have CRI 80 — technically equivalent to halogen in brightness but visibly different in colour quality. Spend a little more on CRI 90+ LEDs for living areas and kitchens. The difference in running cost between CRI 80 and CRI 95 is zero — just a slightly higher upfront cost.
Which LED replaces which halogen?
| Halogen watts | LED replacement | Lumens | Common fitting |
|---|---|---|---|
| 20W | 2–3W LED | 200–250 lm | GU10, MR16 |
| 35W | 4–5W LED | 350–400 lm | GU10, MR16, candle |
| 50W | 6–7W LED | 500–650 lm | GU10, MR16, A-shape |
| 60W | 8–9W LED | 600–800 lm | A-shape (ES/BC) |
| 75W | 10–11W LED | 900–1,050 lm | A-shape (ES/BC) |
| 100W | 13–15W LED | 1,200–1,500 lm | A-shape (ES/BC) |
| 150W | 18–22W LED | 1,800–2,200 lm | A-shape, reflector |
Frequently asked questions
Is LED really better than halogen?
Yes — LED uses 80–90% less electricity for the same light output, lasts 15–25 times longer, produces far less heat, and is safer in enclosed fittings. The only area where older LEDs fell short was colour rendering, but modern CRI 90+ LEDs match halogen visually at a fraction of the running cost.
Can I replace halogen bulbs with LED directly?
In most cases yes — GU10, E27 (ES), B22 (BC), and MR16 LED bulbs are all available as direct replacements. MR16 (12V) bulbs need a compatible LED transformer — many halogen transformers don’t work well with low-wattage LEDs and need replacing. Check the transformer minimum load before buying.
Will LED work with my existing dimmer?
Possibly, but not guaranteed. Halogen dimmers are usually leading-edge (TRIAC) type — many LED bulbs work better on trailing-edge dimmers. If you notice flickering, buzzing, or the lights not dimming smoothly, replace the dimmer with an LED-compatible trailing-edge type. Use our Dimmer Load Calculator to check compatibility.
How long do LED bulbs actually last?
Quality LED bulbs are rated for 25,000–50,000 hours. At 4 hours per day, that’s 17–34 years. Even budget LEDs typically last 10,000–15,000 hours — still 5–7 times longer than a halogen. The “25-year LED” claim is mathematically accurate but assumes moderate use.
Are halogens still available to buy?
In the UK and EU, halogen bulbs have been banned from sale since September 2021. In the US they are still available but the Energy Independence and Security Act effectively phases them out. Whatever your region, the switch to LED is essentially now mandatory for new purchases.
Calculate your exact saving
Enter your bulb count, wattage, daily use, and electricity rate — the calculator shows annual saving, payback period, and lifetime saving over 10 years.
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