Incandescent Light Sources
Conventional filament bulbs.
These are the conventional bulbs which we all recognise and their chief advantage is the colour of light they emit. Colours of objects are generally more accurate with this type of light bulb and they impart a warm feeling to a room.
The disadvantage is that they are inefficient by modern standards and have a relatively short life (around 1000 hours).
Incandescent lamps come in a variety of shapes and sizes and have a number of different fittings:
- Bayonet cap (BC)
- Small Bayonet cap (SBC)
- Edison screw (ES or E27)
- Small Edison Screw (SES or E14)
The Edison screw types are now becoming more popular in the UK.
Several different coatings are also available with the following properties:
- Pearl is an all over frosting which diffuses the light and is best used in a light fitting with shades
- Clear bulbs are more attractive when used in fittings where the bulb is visible or a sparkle is required such as crystal chandeliers
- Reflector bulbs have a silvered surface to direct the light in a certain direction and are usually intended for directional fittings such as spot lights
© Pagazzi 2007