Have a 250 watt metal halide fixture and understand this needs a
source of the red part of the spectrum. Do not want to invest in a
hight pressure sodium fixture so what else might I use? some
incandescent or halogen bulbs?

Merrill Speeter wrote:

Have a 250 watt metal halide fixture and understand this needs a
source of the red part of the spectrum. Do not want to invest in a
hight pressure sodium fixture so what else might I use? some
incandescent or halogen bulbs?


If you have a reasonably new fixture with a reasonably new bulb
(most are 'super' or 'wide spectrum' bulbs), it should not be a
problem. I've never had a problem blooming anything, and I grow under
pure metal halide light with no supplements (not even a window). Maybe
it would be better with more red light, but I doubt it would be much better.

If you are really concerned, a 60W incandescent light bulb would
probably be sufficient. However, if you have even a little bit of
natural light, I wouldn't worry.


Rob

--
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2a. See rule 1
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