OK .... Zandor ... Ive read a decent amount of your postings... you give some decent advice.. however my question isnt about CO2. The question is simply :

Will the introduction of a pair of light movers in a room decrease the end harvest?

Or

Will it have little effect on the harvest, while cutting the over all cost and detectability of the garden?

I know the math says it will work........But not everything that looks good on paper should actually be done. If i cant get a solid answer on this. What i mean by solid is an answer from someone who has already done it. Ill have to try it out for myself to see whats up.