An electric lamp comprises a lamp base and an envelope having a common
axis, a support member having a fixing gap around the common axis, and an
elastic shade of substantially conical shape. The shade has a first end
portion inserted in the fixing gap and a second end portion remote from
the lamp base. The diameter of the first end portion taken
perpendicularly to said axis is smaller than the diameter of the second
end portion, and the elastic shade is made of heat resistant plastic
foil.