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VII.2
Switching from Watts to Lumens
How to choose your light bulb strength
Traditional light bulbs are being phased out and modern light technologies use different
amounts of power to achieve the same amount of light . Instead of referring to watts
anymore, we now need to measure and compare light in terms of lumens.
What are Lumens?
A lumen (lm) is a measure of the total ‘amount’ of visible light emitted by a source; the
higher the number, the brighter the light . Choosing the right kind of light bulb depends
on the strength and type of light you want .
This chart shows an example how the wattage of traditional 60W incandescent bulb with
700 lumens equals a 42W Halogen bulb emitting 630 lumens. This is equivalent to a 12W
eCFL bulb emitting 625 lumens or a 12W LED bulb emitting 810 lumens.
The way forward
GE offers the very best options on the market , in a wide variety of fittings, shapes and sizes.
Many have the option of warm light and are even dimmable. Most also switch on instantly.
Energy efficient light bulbs use less electricity than standard bulbs to do the same job. One
energy saving light bulb could save around £2.50 a year, depending on how long you use
your lights every day, and last around 10 times* longer.
*Source: Energy Saving Trust
700
lumens
810
lumens
LED
Incandescent
eCFL
Halogen
625
lumens
630
lumens
60W
12W
12W
42W
Change
to