Pat says -
| So you get better life with halogen bulbs, but no more light than you would
| with a regular bulb running the same filament temperature.
Except, of course, that you won't find any regular bulbs running that
same filament temperature because they wouldn't last very long, so they
don't make them. Compared to the regular bulbs you WILL find, halogens
do have a hotter filament => whiter light => higher efficiency. That's
why 35w halogen sealed beam headlamps replace 50w, and ordinary 75w
household bulbs have 50w halogen replacements for the same light (at
least, that's what they say on the package).
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