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(5) Mercury is used in non-linear tri-band phosphor lamps to produce ultraviolet light, which is then converted into visible light by the fluorescent coating on the lamp. The composition of the coating, which contains the mercury, determines light colour and colour rendering.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-17 · Text as adopted (Official Journal); later amendments are not incorporated in this text.