The program is run in the following countries:
- UK with member Association LIA
- France with member Association GIL
- Spain with member Association ANFALUM
- Poland with member Association POL Lighting Additional countries can of course join the program if they wish.
The CLI will test both consumer and professional luminaires (one product category will be chosen per quarter. This is done by the national lighting associations using a local test house of their choosing. The actual selection of the products occur, for neutrality reasons, by a mystery shopper.