Quote Originally Posted by brisey
HI all,

I purchased a 250w hps in the end, I also got a 150w blue cfl.
I plan to use the cfl for the seedlings so I can get it nice and close.

When should I start using the hps? And will it be ok to use the hps and cfl together during the veg? And thirdly, I take it I will need to turn the blue cfl off during the 12/12 flowering period??

Many thanks in advance.
I'd say keep the cfl for about a week, then bring the hps in. Some people might say use it right away, or some say after two weeks. It really depends on you and your growing conditions. Start with the hps at least 2x the normal height, and gradually lower it so the plant can get used to it.

No problem using the hps and cfls throughout veg and flowering. :thumbsup: