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Compared with the conventional incandescent, parabolic reflectors
gives a whiter light - a result of its higher operating temperature
of 3000° to 3300° Kelvin; its luminous color is still
in the warm white range. The continuous spectrum produces excellent
color rendering properties. The luminous efficacy of parabolic
reflectors is well above that of conventional incandescents -
especially in the low-voltage range. Parabolic reflectors may
have a dichroic, heat-reflecting coating inside the bulbs, which
increases the luminous efficacy of these bulbs considerably.
The life of parabolic reflectors is longer than that of conventional
incandescents. Parabolic reflectors are dimmable. Like conventional
incandescent bulbs, they require no additional control gear. In
the case of double-ended bulbs, projector bulbs and special purpose
bulbs for studios the burning position is frequently restricted.
Some tungsten halogen bulbs have to be operated with a protective
glass cover.
Parabolic reflectors for standard voltage with a medium screw
base and outer envelope are used in many home commercial and even
industrial applications. |
