03-04-2015, 07:41 AM
Lamps convert electrical power (W) into luminous power (lumen, lm).
The light yield (lm/W) is a measure of efficiency.
Filament lamps typically provide warm white light which can be dimmed without restriction and give very good colour rendering. They offer high lighting intensity, particularly in the case
of halogen bulbs, and their compact size allows small lighting outlines and very good focusing characteristics (e.g. spotlights). However, filament lamps also have a low lighting efficiency (lmIW) and a relatively short bulb life of between 1000 and 3000 hours.
The light yield (lm/W) is a measure of efficiency.
Filament lamps typically provide warm white light which can be dimmed without restriction and give very good colour rendering. They offer high lighting intensity, particularly in the case
of halogen bulbs, and their compact size allows small lighting outlines and very good focusing characteristics (e.g. spotlights). However, filament lamps also have a low lighting efficiency (lmIW) and a relatively short bulb life of between 1000 and 3000 hours.
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