Lamp with improved photometric distribution

A lamp comprising:

• an envelope having a proximal end and a distal end, said envelope having a central axis passing through said proximal and distal ends;
• a base having a central axis coinciding with said central axis of said envelope, said base supporting and electrically connecting a radiant light source to an external power supply, said base having a proximal end and a distal end, said distal end of said base being attached to the proximal end of said envelope;
• said envelope having a light transmissive window at its proximal end, said window having a proximal end and a distal end, said window being disposed about said central axis and extending away from the distal end said base;
• a reflector formed on a surface of said envelope, opposite to said window, and having a proximal end and a distal end, said reflector having its proximal end adjacent to the distal end of said window and disposed about said central axis, reflector being in the form of an internally concave figure of revolution having a focus at said radiant light source and so configured as to direct the light from the source through said window at approximately a 45.degree. angle from the proximal end of the central axis.