D7EST datasheet(28/54 Pages) OSRAM

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2. Function and technical design

OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

2.2.2 Energy savings

thanks to electronic

control gear

(Continued)

Overall the power balance of fluorescent lamps with conventional control gear and

electronic control gear is as follows:

Fig. 5:

Power balance of a fluorescent lamp with a) conventional and

b) electronic control gear

Wärmeverlust durch:

18,3 % Vorschaltgerät

25,4 % Gasentladung

33,8 % Umsetzung der

UV-Strahlen im

Leuchtstoff

UV-Strahlung

56,3 %

100 %

Licht

2,4 %

Licht 22,5 %

20,1%

Conventional control gear

Wärmeverlust durch:

9,9 % Vorschaltgerät

20,7 % Gasentladung

41,6 % Umsetzung der

UV-Strahlen im

Leuchtstoff

UV-Strahlung

69,4 %

100 %

Licht

2,9 %

Licht 27,8 %

24,9%

Wärmeverlust durch:

9,9 % Vorschaltgerät

UV-Strahlung

69,4 %

20,7 % Gasentladung

41,6 % Umsetzung der

UV-Strahlen im

Leuchtstoff

100 %

Licht

2,9 %

Licht 27,8 %

24,9%

Electronic control gear

2.2.3 Visual comfort

The use of electronic control gear also brings photometric benefits that considerably

improve visual comfort.

Electrode flickering and luminous ripple, which are normal with conventional control

gear, cannot be perceived by the human eye at these high frequencies at which the

lamp is operated. The eye therefore does not tire as quickly and the light is more

comfortable.

Light

2.4 %

Light 23.5 %

Heat loss:

18.3 % control gear

25.4 % gas discharge

33.8 % Conversion of

UV radiation in

the phosphor

UV radiation

56.3 %

20.1 %

Light

2.9 %

Light 27.8 %

Heat loss:

9.9 %

control gear

20.7 % gas discharge

41.6 % Conversion of

UV radiation in

the phosphor

UV radiation

69.4 %

24.9 %

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