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Special Lamp Types
Described above are the main types of halogen lamps used for general lighting. There is a
wide range of halogen lamps for special applications such as auto lamps, projector lamps, heating
lamps, and stage/studio lamps.
Additional Advantages of Halogen Lamps
Halogen lamps offer a number of economic and quality advantages:
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Provide excellent colour
rendering.
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Light is whiter than that of
conventional incandescent lamps.
-
Continuous spectrum with particular
emphasis on warm colours.
-
Unmatched in precise light control
from small, lightweight luminaires.
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Small luminaires because of small
lamp size and no ballast required. (Low volt versions do require a transformer.)
-
Luminaires are easy to
install.
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Halogen lamps deliver full light
output at the flick of a switch.
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No warm-up required.
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Simple dimming control is
possible.
Halogen Lamp Applications
Halogen lamps are ideal for a wide range of applications from airports to TV studios as can
be seen from the following list:
Airfields
Radiant Heating
Department Stores
Slide Projectors
Security Lighting
Vehicle Lamps
Display Cases
Theatres
Supermarkets
Shop Windows
Dentistry
Traffic Signals
Garden Lighting
Lighthouses
TV and Film Studios
Operating Theatres
Dental spotlights as shown in
Figure 8.13 are typical of optical devices and instruments that use halogen lamps. Some use low
voltage lamps with smaller filaments to approximate a point source of light. Low voltage lamps have
higher lamp efficacy and better beam control. However, low voltage lamps require a
transformer.
Figure 8.13. Optical devices and
instruments.
Downlights often use single-ended
capsule lamps or low voltage reflectors. Small unobtrusive luminaires are possible because of the
compact lamp proportions. See Figure 8.14. Downlighting is found in offices, stores, lobbies,
restaurants, theatres, hotels and homes.
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