What you need to know about LED lamps
German article by Ulrike Kuhlman at heise.de
Have you ever wanted to buy an LED lamp, but were confused by the data on the packaging? With a few technical explanations you will know what you need to be aware of.
Whenever we had to replace a light bulb we went to the store and bought, for example, a 60 watt bulb – it sufficed to know the wattage. In contrast, the packaging of today's LED lamps contains further information. But what does 600 lumens actually mean for this kind of lamp? Will a LED lamp specified for 5 watts be OK for the proposed use, or would the 10 watt model be better? How bright is the lamp really? Does is produce a cold or warm light? How big is its light cone?
In this article we explain a few basic facts about LEDs.