Paint it with red nail varnish, or if you can get hold of the coloured gell filters that stage lighting people use cut a piece and put it inside the light. Ask at a local theatre or ask some "Am Dram" people.
You should use glass paint, try Hobbies, you can get a catalog from any WH Smiths
Would an amber colour do? SAAB use amber bulbs in the rear indicators, try any SAAB dealer.
You should use glass paint, try Hobbies, you can get a catalog from any WH Smiths
Would an amber colour do? SAAB use amber bulbs in the rear indicators, try any SAAB dealer.
There is a company called EBT Technologies that manufacture coloured silicon sleeves for lamps but I dont know if they make them large enough for 21/22w size