Thanks for all the info.

I have not bought anything yet. I have found a few ballasts that are switchable. That is actually not an issue.:thumbsup:

However I read somewhere that the best lighting was both MH and HPS simultainiously for all stages. Under that was MH for growth and HPS for flowering. However both for all is said to produce the best and healthiest plants. This lead me to finding these bulbs. I really like the idea of both, so I guess the question would be,..

With only a 6 foot by 10 foot room running 2- 1000w, (consisting of two duel arc bulbs). Would that NOT be enough regardless of the loss caused mostly by the bulb being 1/2 the size of a normal bulb on each half?

OR, Would this just be way overdoing it?

Seams most things I've read, agree with slightly less then what I'm suggesting for a room this size. To me it seams a little overkill to compensate for the bulbs should fix that issue.

OR, is the spectrum on this type of bulb just not right?

Again thanks for the replies
Vancefish Reviewed by Vancefish on . Which ballast runs these bulbs? I asked this question in the which light post below this one but no body replied. So, I re-posted as my own thread. So, just got my license in Colorado. Prices at the dispenseries are insane. I assume it's the same everywhere but here if you sign your rights over to a grower. They MIGHT give you a small discount. Like $4 off a $20 gram. So, For years I've kept iguannas in a small room in my home. However after 17 years the two monsters are fading quickly. Time to convert the room to MMJ Rating: 5