Alot of buildings Might use them maybe HD lowes menards etc, go ask what
they use and see how bright it is, pointed up it may be ok, but bright
im sure there are UV lenses available or built in now as standard in
You certainly can, they're excellent for indirect lighting
applications, use them in a fixture that throws the light up at the
ceiling for very diffuse, low-glare lighting. I used to have a 400W
halide fixture for my cathedral-ceiling living room -- a huge,
dramatic wall sconce at one end lit the whole room with light bounced
off the wall and ceiling.
I worked for a time in an architect's office that had 240W halides
throughout, bounced up off the high ceiling, it was beautiful
lighting for that work, almost no distinct shadow when your hand
moved over a drawing, since there was light coming at it from all
firstname.lastname@example.org is Joshua Putnam
You need the right fixture, and a Metal halide ballast, and cooling for
Metal Halide bulbs are used quite often for horticulture, so check in
the indoor growing area. 175 and 250 watt would be more common, as they
throw a LOT of light, and a 400 watter would light up a warehouse.
For example, the local box store has the smaller bulbs on the shelf.
That is way too expensive. They sell the bulbs in HD for around $25. I
collect light bulbs and can tell you that its too expensive. You will
need a ballast though.
There is no danger from UV if the glass outer shell is intact.
There IS a danger from explosion, and those bulbs must be encased in a
fixture that can contain them. Occasionally the bigger ones (1500W)
will pop at a stadium and you can hear them go from across the field.
The quartz in them is red hot. But I think they only blow when they get
near the end of their life time.
The 400W is the cheapest of the lot. The smaller ones are more
expensive, as are the larger ones, as 400W is the most common.
You can also buy them at www.lightbulbdepot.com and www.topbulb.com,
One more downside to MH is that once you turn it off, you have to wait
for it to cool down before it will re-start. And they take a minute or
so to warm up, so its not for a room in a house.
I like them for a workshop though - plenty of light and little heat
(compared to tungsten bulbs).
Hm, a "fuxture" sounds like some sexy bedroom toy. :)
Seriously, thank you very much, I am going to read up on that. I
suppose that these fixtures provide adequate fire protection.
scratcing his fuxture
Uv filters are nearly clear to the eye and might lower output less than
1%, but are probably part of the bulbs glass.
If you have 8, 4 ft 40 watt flourescent now and are not happy then you
might be fine, if you upshoot the light, you will likely only triple
output. Flourescent are not more efficient as someone stated. But go by
lumen output, figure out what your tubes are and you decide if you can
handle it. There is a temp -time rating for startup so look into that as
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