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A halogen bulb will typically run cooler than a standard incandescent
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While this might be true if both lamps had the same light output, the usual reason for using halogen is to get more light output. Typical halogen automotive lamps have higher light output & noticeably higher heat to go with it. A typical 1157H halogen bulb is rated at 15/50w & will run much hotter than the 1157 incandescent, rated at 8/27w. On headlights, which have a maximum wattage spec, the halogen may be cooler for the same watts. I think it is all in which lamps you compare?
D
A halogen bulb will typically run cooler than a standard incandescent
[/ QUOTE ]
While this might be true if both lamps had the same light output, the usual reason for using halogen is to get more light output. Typical halogen automotive lamps have higher light output & noticeably higher heat to go with it. A typical 1157H halogen bulb is rated at 15/50w & will run much hotter than the 1157 incandescent, rated at 8/27w. On headlights, which have a maximum wattage spec, the halogen may be cooler for the same watts. I think it is all in which lamps you compare?
D