Re: Mercury Vapor Lights

To: Aquatic-Plants at actwin_com
Subject: Re: Mercury Vapor Lights
From: George Booth <booth at hpmtlgb1_lvld.hp.com>
Date: Wed, 13 Nov 1996 09:12:53 -0700
In-Reply-To: Your message of "Wed, 13 Nov 1996 03:39:02 EST." <199611130839.DAA16006 at looney_actwin.com>

From: JOlson8590 at aol_com
Date: Wed, 13 Nov 1996 02:53:11 -0500

> Our "Metal Halide" lamps work on a different principle: The Halide
> Vapor is a "preservative" for a tungsten filament, a filament similar
> to the one in the common light bulb.  However, because of the Halide
> Vapor protecting the filament, the filament can get a LOT hotter
> without burning out. Thus, the high CRI from the very HOT Filament.
> Also greater Lumens per Watt, same reason.

Correct me if I'm wrong, but I thought Metal Halide bulbs got their
light from an arc in high pressure vapor (like MV and HPS) but the
[more expensive] halides in the vapor created a better spectrum. 

What you described sounds more like Halogen bulbs. 

I could be confused.  

George