Lumens are the new unit of measurement for brightness in light bulbs. In the past, the strength of light bulbs was measured in watts, which is actually a measure of power. Consult our conversion chart to learn more about lumens.
Colour temperature describes the appearance or tint of a particular light. Most bulbs emit a white light, but this white light can range from warm to cool. Read this guide to find the right colour temperature for your new light bulbs.
Traditional incandescent light bulbs are very inefficient – they waste 95% of the electricity they use by turning it into
The Lightbulb Company (UK) Ltd acknowledges the copyright of Philips Lighting B.V. as the source for this glossary.
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