Electric lamp having a coloured lamp envelope

Details Electric lamp having a coloured lamp envelope Electric lamp having a coloured lamp envelope

H - Electricity

01

K

313/83, 313/172.

H01K 1/32 (2006.01)

Patent

CA 1214195

-7- ABSTRACT: An electric lamp according to the invention has a lamp envelope (1) which at its inner surface is coated with two electrostatically applied powder layers. One layer (2a) comprises a cadmium pigment and a light- scattering powder and the other inner layer (2b) com- prises mainly light-scattering powder. In order to obtain comparable optical properties, in the lamp according to the invention a considerably smaller quantity of pigment is required than in conventional lamps having a single coating layer.

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