On the WATTage thread - Watts = HEAT. Heat in excess of the amount the enclosure is designed to disapate will build up and damage the unit to a greater or lesser extent. +X% LIGHT or colour has no effect on the enclosure.
Good - Fast - Cheap: Pick any two.
E23 735i; E30 318i; E32 735iL (X 2 - 1 White and 1 Light Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i