Guide to the table
Our test was funded by the Electricity Commission and carried out in an independent laboratory in New Zealand.
- Price is based on a price survey in April 2009. Prices are per bulb.
- Light output (60% of overall score) is based on Relative light output (see below).
- Switching life (40% of overall score) is calculated on the number of on/off cycles the bulb could withstand, up to a maximum of 10,000.
- Relative light output shows the total light output of the bulb compared with the average output of seven 100W incandescent bulbs of different makes.
- Watts as claimed by the manufacturer.
- Colour temperature is the “warmness” of the bulb’s light – from 2700K (which gives a soft yellowish light suitable for living/relaxing areas) up to 6400K (which gives a harsher “bluer” light suitable for work areas).
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