Subject: A few questions about MH and HPS lamps

From: [email-masked] (David Whittaker)
Date: Wed, 10 May 1995 09:42:38 GMT

I'd appreciate any knowledge that someone might care to
share with this non-engineer.
Are there any high pressure sodium lamps whose spectral
emission distribution approximates sunlight?
How would that compare with the SED of the metal halide
lamps that are normally employed in the retail trade?
What would be the relative efficiencies of MH, HPS and
fluorescent "daylight" bulbs?

This is for hobby purposes and I'm searching for reasonably
priced sources of "sunlight," ballasts and reflectors.

Thankyou,

Dave
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