Datasheet

KNOW-HOW

The trick is: Know-how increases sales

The number of different lamps available has become more and more varied over the last few years. Complex high-tech

products such as compact ﬂ uorescent and LED lamps have established themselves on the market. At the same time, the good

old incandescent lamp, which used to be a universal light solution for every occasion, is gradually disappearing from view.

Below we have included some of most important questions relating to purchasing lamps and the corresponding answers so

that you can offer your customers consistently competent advice and always recommend the correct lamp.

Why is the lumen rating printed in large font on the

packaging?

Various types of modern technology use different amounts

of electricity to produce a certain amount of light and sig-

niﬁ cantly less power (watts) compared to conventional in-

candescent lamps.The wattage rating of a lamp has there-

fore become less important. As a ﬁ xed reference value, the

speciﬁ cation of the light ﬂ ux rating in lumens is much more

appropriate because this unit represents the quantity of

light emitted by a light source in all directions and there-

fore allows direct comparison of lamps using different

technologies. In order to determine how efﬁ ciently a cer-

tain lamp operates, the lumen value (lm) is divided by the

number of watts (W) to produce the light ﬂ ux attained in

relation to the power consumed (lm/W).

Why do LED and compact ﬂ uorescent lamps have a

higher lumen value than equivalent incandescent lamps?

Because the light ﬂ ux of LED and compact ﬂ uorescent

lamps decreases more over the course of the lamp operat-

ing life than the relatively constant incandescent and halo-

gen lamps, legislation dictates that they must have a higher

initial light ﬂ ux to qualify as an equivalent alternative lamp

(see table).

Incandescent lamp Halogen lamps Compact ﬂ uorescent LED

(CLASSIC ECO SUPERSTAR) lamps lamps

[W] [lm] Rated value of the light flux

Φ [lm]

15 90 119 125 136

25 220 217 229 249

40 415 410 432 470

60 710 702 741 806

75 935 920 970 1055

100 1345 1326 1398 1521