LED Energy Savings Calculator
Discover how much you can save by switching to LED lighting. Calculation based on real equivalence factors by technology.
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📊 Power Equivalence Table
Comparison between technologies and their LED equivalent to achieve the same amount of light.
| Technology | Example Wattage | LED Equivalent | Savings | Lifespan |
|---|---|---|---|---|
| Incandescent | 60 W | 10 W | ~83% | 1,000 h |
| Halogen | 50 W | 10 W | ~80% | 2,000 h |
| CFL (low consumption) | 23 W | 12 W | ~50% | 8,000 h |
| T8 Fluorescent Tube | 36 W | 22 W | ~40% | 10,000 h |
| Metal Halide | 150 W | 50 W | ~67% | 6,000 h |
| LED | — | — | Reference | 25,000–50,000 h |
⏱️ Compared Service Life
An LED luminaire lasts between 25,000 and 50,000 hours, compared to 1,000 for an incandescent. Fewer replacements, less waste.
🌍 Environmental Benefits
LED not only saves on your bill: it contributes to the planet's sustainability.
- Lower power consumption — up to 80% less than incandescents
- Mercury-free — unlike fluorescents
- Less waste — an LED lasts up to 50× longer than an incandescent
- Lower carbon footprint — reduces CO₂ emissions
- Recyclable — LED components are recyclable
Frequently Asked Questions about LED Energy Saving
We address the most common questions about switching to LED lighting and saving on your electricity bill
How much does an LED bulb cost in euros?
An LED bulb of 10 W used for 5 hours a day over a year consumes approximately 18.25 kWh. At an average price of €0.18/kWh, this amounts to an annual cost of only €3.28.
In comparison, an equivalent 60 W incandescent bulb would cost €19.71 per year under the same conditions. This represents a saving of more than €16 per bulb per year.
Incandescent 60 W × 5 h/day × 365 days = 109.5 kWh → €19.71/year
Use our calculator to obtain the exact cost based on your usage hours and your electricity rate.
What is the LED equivalent of a 60W incandescent bulb?
A 60 W incandescent bulb is equivalent to an LED bulb of approximately 8-10 W, with both producing around 800 lumens. The general equivalence is that LED consumes approximately 1/6 the power of an incandescent to provide the same light output.
Incandescent 60 W → LED 9 W (~800 lm)
Incandescent 75 W → LED 11 W (~1,100 lm)
Incandescent 100 W → LED 14 W (~1,600 lm)
This equivalence is based on luminous efficacy: while an incandescent bulb produces about 12-15 lm/W, a current LED achieves 100-140 lm/W.
Which consumes less power: LED bulb or low-consumption (CFL) bulb?
LEDs consume less than low-consumption bulbs (compact fluorescents or CFLs). To achieve the same amount of light, an LED requires approximately half the power of a CFL.
CFL 15 W → LED 8 W (~800 lm)
CFL 11 W → LED 6 W (~600 lm)
In addition, LEDs offer other advantages: instant start (CFLs take time to reach maximum brightness), longer lifespan (25,000 h vs 8,000 h), they contain no mercury, and are not affected by switching cycles.
How long does an LED bulb last? Compared lifespan
A quality LED bulb has a service life of 25,000 to 50,000 hours. This means that, with 5 hours of daily use, it can last between 13 and 27 years.
Halogen → 2,000 h (~1 year)
CFL (low consumption) → 8,000 h (~4 years)
T8 fluorescent tube → 10,000 h (~5 years)
LED → 25,000-50,000 h (13-27 years)
This means that a single LED bulb can replace 25-50 incandescent bulbs during its lifetime, resulting in additional savings in replacement costs and less waste generated.
How do you replace a fluorescent tube with an LED tube? Is it worth it?
Yes, it is worth it. A T8 fluorescent tube of 36 W can be replaced by an LED tube of 18-22 W that produces the same or greater amount of light, saving approximately 40% energy.
There are two types of LED tubes:
• Compatible LED tubes: These are installed directly without modifying the fixture. You only need to remove the starter and bridge it with the included fuse.
• Direct-to-mains LED tubes: Require bypassing the ballast (transformer) in the fixture, connecting the tube directly to 220V. They are more efficient in the long term.
Use our calculator by selecting «T8 tubular fluorescent» to see the exact savings based on your installation.
How much does an LED bulb consume per hour?
The hourly consumption of an LED bulb depends directly on its wattage. To calculate consumption in kWh, divide the wattage by 1,000:
LED bulb 10 W → 0.010 kWh/hour → 0.0018 €/hour
LED bulb 15 W → 0.015 kWh/hour → 0.0027 €/hour
LED bulb 20 W → 0.020 kWh/hour → 0.0036 €/hour
In practical terms, 10 LED bulbs of 10 W each turned on for one hour cost less than 2 cents (at €0.18/kWh). That is why LED technology offers such significant savings compared to older technologies.
How can I calculate how much I save by switching to LED?
The calculation of savings is based on the difference in consumption between your current technology and the equivalent LED:
Savings € = Savings kWh × kWh Price
For example, if you have 20 incandescent bulbs of 60 W and replace them with 10 W LED bulbs, used 8 hours per day:
Annual savings = 20 × (60-10) × 8 × 365 ÷ 1,000 = 2,920 kWh = €525.60
Our calculator performs these calculations automatically, including the payback period and accumulated savings over 5 and 10 years.
How much CO₂ do I save by switching to LED lighting?
The CO₂ emission factor for the Spanish electricity mix is approximately 0.233 kg CO₂ per kWh consumed. This means that every kWh you save prevents almost a quarter of a kilogram of CO₂ from being emitted into the atmosphere.
Following the previous example (savings of 2,920 kWh/year), the emissions reduction would be:
2,920 kWh × 0.233 = 680 kg of CO₂ per year
This amount is roughly equivalent to planting 31 trees (a tree absorbs about 22 kg of CO₂ per year). In addition, LED bulbs do not contain mercury or other toxic materials, unlike fluorescent lamps.
How long does it take to recoup the investment in LED?
The payback period depends on three factors: the consumption difference, hours of use, and the cost of the LED luminaires. In general, the investment is recovered in 6 to 18 months.
For example, if you invest €300 in LED luminaires and save €525 per year, the payback is only 6.8 months. From then on, all savings are net profit.
The more hours of use and the greater the power difference (for example, replacing incandescents yields more return than replacing fluorescents), the faster the investment is recovered.
The calculator shows you the exact payback period and the accumulated savings at 5 and 10 years.
How much can I save on my electricity bill with LED?
The savings depend on the type of lighting you replace and the hours of use, but switching to LED can reduce lighting consumption by 50% to 90%:
From halogen → savings ~80%
From CFL (low consumption) → savings ~50%
From T8 fluorescent → savings ~40%
From metal halide → savings ~67%
In a typical household, lighting represents between 10% and 20% of electricity consumption. In commercial and office spaces, it can exceed 30%. Therefore, switching to LED can mean significant savings on your monthly bill, especially in installations with many light points or long operating hours.