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A large variety of light sources can be used for the 2nd European Design Competition "Lights of the Future".

The two key criteria that we require for the lamp selections are:

1. The lamp can not be replaced by an incandescent lamp, i.e. the luminare cannot use an ordinary incandescent lamp socket, which on the main-land Europe are E ( Edison) screw type caps ( E10, E, 14, E 27 which is the most common, E 40 ) and in the UK are Bayonet type ( B15, B 22).

2. That the lamp/circuitry is rather efficient i.e. that:

a) the lamp is classified in class A or B according to the European Directive introducing the energy label for lamps (you can download it here (PDF 6MB) or find it in Official Journal of the European Communities L 71/1 of 10.3.98, the official title of the Directive is COMMISSION DIRECTIVE 98/11/EC of 27 January 1998 implementing Council Directive 92/75/EEC with regard to energy labelling of household lamps);

b) the ballast/power supply has low stand-by losses, and, in case of fluorescent lamps, the ballast shall be of class A or B of the CELMA classification.

Since not all the lamps are covered by the DIRECTIVE 98/11/EC, nor the ballasts in the CELMA classification we use as additional criteria that the lamp-system efficiency (lamp + circuitry) should be greater than 50 lm/W.

The design competition principle aims at promoting white light lamps, not coloured lamps. Accordingly a Colour rendering index Ra is recommended in accordance with existing practice/standards, the Ra should then be greater than 80.

Furthermore there are also some recommendation regarding the Colour Temperature Tk. Since the competition aims to have luminaries which are meant as an incandescent replacement. Therefore a limited Tk range namely 2700-3500K, is recommended.

Typical lamps that can be used are:

• pin based CFL (including circular shaped);

• linear fluorescent (T8, T5, T2, etc.);

• Induction lamp (i.e. electrodeless fluorescent lamp)

• cold cathode fluorescent;

• metal halide;

The competition aims also at encouraging design with new technologies such as LED. As today there are no LED's commercially available that allow for a 50 lm/W white lamp. Although this will change in the next few years this practically excludes LED's for white light.

However to encourage LED design for LED we accept LED coloured lamps, in a special category.

Some additional information can be found at:

https://eu-greenlight.org/l_all.htm

or contact individual lamp and ballasts manufacturers.

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