Technical Data • Optical Guide Specification
Lamp Characteristics Efficacy of fluorescent lamp systems – typical examples:
Conventional gear
Electronic gear HFR, HFP, EBS or EBE
Lamp Ballast Total Lamp flux System efficacy Energy saving potential
4 x 18 W 14 W 86 W 4 x 1350 lumen 63 lumen/Watt
4 x 16 W 10 W 74 W 4 x 1400 lumen 76 lumen/Watt 16%
Lamp Ballast Total Lamp flux System efficacy Energy saving potential
36 W 8W 44 W 3350 lumen 76 lumen/Watt
Lamp Ballast Total Lamp flux System efficacy Energy saving potential
58 W 11 W 69 W 5200 lumen 75 lumen/Watt
50 W 5W 55 W 5000 lumen 89 lumen/Watt 26%
Lamp Ballast Total Lamp flux System efficacy
Not available
4 x 14 W 6W 62 W 4 x 1350 lumen 87 lumen/Watt
Lamp Ballast Total Lamp flux System efficacy
Not available
28 W 4W 32 W 2900 lumen 91 lumen/Watt
Lamp Ballast Total Lamp flux System efficacy
Not available
49 W 5W 54 W 4900 lumen 91 lumen/Watt
Lamp type TL-D 18 W 4-lamp system
TL-D 36 W l-lamp system
TL-D 58 W l-lamp system
TL5 HE 14 W 4-lamp system
TL5 HE 28 W l-lamp system
TL5 HO 49 W l-lamp system
7.12
Philips Lighting Catalogue
32 W 4W 36 W 3200 lumen 89 lumen/Watt 22%
Colour temperature and colour rendering Correct light colours and correct reproduction of colours assists us in recognising our surroundings. The colour climate of an artificially-lit space is determined by the light colour and the colour rendering. Room furnishings of wood and fabrics in warm or pastel colours require warm lighting in the colour /827 or /927. The more business-like the interior is, the cooler the light can be. Furniture using chromium, glass and marble, or in black and white, is emphasised by the cool light colours /840 and /940.
Colour Rendering (Ra) Colour rendering is the ability of a light source to reproduce colour. The light source is put over an 8-colour slide test, and the light source’s ability to reproduce colour is tested. From this, it is rated on the CRI (Colour Rendering Index). E.g. The ‘8’ in 840 indicates a colour rendering between 80-90.
Moderate: 60 < Ra < 80
Good: 80 ≤ Ra < 90
Excellent: Ra ≥ 90
Colour Temperature (K) Colour temperature refers to the colour appearance of a light source. It is measured in degrees Kelvin(K). E.g. The ‘40’ in 840 indicates a colour temperature of 4000K.
Warm
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Cool
2700
3000
4000
5000
6500
Incandescent Light
Warm White
Cool White
Daylight
Cool Daylight