elisa123 0 Report post Posted October 5, 2011 Blister greater the smaller lumen, ie evaporation and deposition of tungsten light output is proportional to the block. As part of the inflatable bulb to prevent the evaporation of tungsten is smaller so the light fades. If it is the same incandescent filament, made in different size bubble shell, relatively the same time bad light indeed smaller than the large bubble shell bubble shell small. In addition you say outside the bubble is also a large inflatable space within the glass bulb, gas for heat flow to a relatively large glass area, a relatively small light bulb is much lower temperatures, the temperature of the filament is relatively low, the luminous efficiency low, tungsten evaporation rate is low, so the light fades to be small. But the same filament light bulb efficiency in large than small filament bulb is much lower. So when the filament is designed to separate the design, production, comparable in reality meaningless. N-hour light failure = 1 - (N-hour flux / 0 hours of luminous flux) Share this post Link to post Share on other sites
