At 08:25 AM 7/3/01 -0400, you wrote:
>
>If two 120V bulbs in series works well, then why don't the manufacturers put
>two 120V filaments in series in one envelope?

Cooler running filaments produce less (and redder) light per watt.
Ignoring the costs of changing them, electricity used is more expensive
than the actual cost of the bulb, maybe by 10:1 or 5:1, depending on
what you pay per kWH, from what I've seen. So, you'll get less light
per $ with a longer lasting bulb.

>Or just create one filament, with the same wire, but twice as long?

Obviously it isn't all that hard, they do have light bulbs in Europe. ;-)

Best regards,

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