Ray wrote:
Joanna,

If Rob's rule-of-thumb says you can get by with two, there's nothing that
says four won't work! As a matter of fact, if you go with four you'll be
much happier in the long run, and you'll be able to grow somewhat
higher-light plants there as well.

By the way, congratulations on the future son. When do we all get to
celebrate (that coincides with when you and your husband stop sleeping)?


I agree with Ray and Steve. Four is better than two. Most people who
ask that question are looking for validation not to spend money on more
lights... But more is better. 20" sounds ok if you are supplementing,
although I don't know that cattleyas would do well 20" away from tubes
if that is all you had.

I always edit babies to she, since that is the variety I know best. *grin*

Rob

--
Rob's Rules: http://littlefrogfarm.com
1) There is always room for one more orchid
2) There is always room for two more orchids
2a) See rule 1
3) When one has insufficient credit to obtain more
orchids, obtain more credit