Instruction manual

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7.5.3 Luminaire

Optimisation

With the mentioned measuring principle the best correlation between

ambient temperature and cold spot temperature of the T5-lamps is

achieved.

7.5.4 Maximum luminous

flux for FH

…HE

fluorescent lamps

So called Horseshoe Curve shows the correlation in between the cold spot

temperature and the ambient temperature ta.

7.5.5 Verticalness

Operation

If luminares are operated in horizontal position the lamp stamp of the

…HE und FQ

…HO fluorescent lamps have to be placed down.

Luminaires with circular FC

lamps have to have the lamp socket

positioned down.

Attach the thermocouples in the area of the lamp caps

within a distance of 2mm from the glass tube

Measuring point with the best correlation

between cold-spot temperature and

ambient temperature

Lamp etch

T5 FH28W (nearly constant power supply): Luminous flux / Voltage - Horseshoe

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

55% 60% 65% 70% 75% 80% 85% 90% 95% 100%

relative lamp voltage

relative light output

COLD SPOT temperature

50°C 45°C

40°C

35°C

30°C

25°C

15°C

90°C

85°C

80°C

75°C

70°C

65°C

60°C

55°C

5°C

10°C

0°C

20°C

ambient temperature

-5°C

75°C

25°C

35°C

45°C

5°C

-25°C

55°C