Electricity usage of LED light bulbs
LEDs and LED Bulbs use less energy than all other bulb options. They are more energy efficient than CFL (Compact Fluorescent Lamps) and substantially more efficient than halogen and incandescent lamps.
What are LEDs?
LEDs or light-emitting diodes are a very energy efficient option for lighting, saving you up to 80% on energy bills.
How much does it cost to light a bulb?
Use our Bulb Energy Cost Calculator below to find out the running cost of your home or business lighting. We’ve included recent advertised costs from some of the more popular energy suppliers but please check their current up to date tariffs for the most accurate cost calculations.
Note: There are different advertised rates and saver rates for each supplier and we’ve chosen the standard rates.
- Bord Gais Energy
Standard Electricity Unit Rate (Cent Per kWh) – 48.19c - Electric Ireland
Standard Electricity Unit Rate (Cent Per kWh) – 43.27c - Flogas
Standard Electricity Unit Rate (Cent Per kWh) – 62.27c - SSE Airtricity
Standard Electricity Unit Rate (Cent Per kWh) – 48.24c
Enter the hours of use, wattage for the lights and price per kWh (we’ve pre-populated this with the unit price of 45 cents per kWh).
Energy Calculator
Watts vs Lumens
Many people still use the old rule of thumb for a medium size room you use a 100w lightbulb. This refers to the old incandescent bulbs that use 100 watts of electricity to give you a certain light level.
Light levels are measured in lumens. A 100 watt incandescent light bulb gives approximately 1600 lumens of light. So look for the Lumens on the packaging and not the wattage.
Comparisons
You can compare your current light bulb against our Energy Efficient LED bulbs listed below.
Lumens
470
806
1521
500
Type
ES/BC
ES/BC
ES/BC
GU10
Incandescent
40 Watt
60 Watt
100 Watt
Hallogen
29 Watt
42 Watt
72 Watt
50 Watt
CFL
9 Watt
14 Watt
23 Watt
LED
4 Watt
7 Watt
10 Watt
5 Watt
