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Efficacy: Poor (15 Lumens per Watt);
When first developed, Halogen incandescent sources were heralded for being fifty percent more efficient than standard incandescent.
Compared to sources like LED and ceramic metal halide, which both
offer similar lamp shapes, this number is now less than impressive.
Lamp Life: medium to good;
The higher temperature of Halogen Incandescent lamps creates a situation in which the metal of the filament recycles within the lamp, thus, extending lamp life significantly. Halogen sources generally last about 3000 hours, but can be engineered to last as long as 10,000 hours (as long as 10 years by our residential assumption of 1000 hours per year)
Temperature requirements: None;
Halogen incandescent sources will operate well in any reasonable temperature condition.
Heat Generated: Lots;
Halogen incandescent sources create a significant amount of heat that must be considered for safety as well as added heat load to a space.
Noise Generated: Some;
Halogen incandescent sources “buzz” when they are dimmed down. In addition to the buzz of the filament, some halogen sources rely on magnetic transformers which can also create noise.
Halogen incandescent lamps are moderately expensive lamps that, like
incandescent, are rather inefficient and create excess heat. We use halogen sources where we want the excellent color-rendering capabilities and the nearly neutral color. Halogen sources are very small, so they can be incorporated into smaller luminaires and into precision accenting luminaires that drive out a directional beam of light for accenting specific surfaces and objects.
Advancements in LED and ceramic metal halide technology have resulted in
lamp shapes that provide the same directable light as halogen incandescent sources with much greater efficacies, increased lamp life and suitable color rendering indices (CRI).
FLUORESCENT LAMPS