An incandescent lamp or discharge lamp, the bulb of which, usually of appropriate shape, is partly coated with a reflecting layer, in order to direct the light.
Note: Among the types of lamps in this class are the following:
- The Pressed Glass Lamp, the bulb of which consists of two glass parts fused together, namely a metallized reflecting bowl and a patterned cover forming an optical system.
- The Sealed Beam Lamp, a type of pressed glass lamp designed to give a controlled beam of light.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM