These are small very powerful lamps designed for decorative fittings such as uplighters.

They give an intense white light and their small physical size in makes them a very useful lamp.

They are commonly found in office lighting rather than in domestic lighting.

They are only available in small bayonet and screw bases.

The pearl glass "softens" the light output, the frosted is half way between clear and pearl.

The 250 watt is only available in small bayonet base.