Lighting question please help

[PurpleMeds]

In an indoor grow, can MH light be used for flowering or will the plants not flower?

Are HPS lights the only way to go during flowering?

[headshake]

well let's see, you posted this topic twice and mis-posted it both times. for a lighting question, i'd think you should post it in the indoor lighting forum, if you want a quick answer.

you can use a MH for flower, it has to do with the amount of time it gets light (signaling the end of summer and the beginning of fall, as cannabis is an annual plant). so as the summer comes to an end the hours of the day are shorter. to force you ladies to flower you give them 12/12 of light and dark.

the MH is more in the blue spectrum while the HPS puts out a more orange/red. the MH works better for veg and the HPS for flower but neither is required. they actually make bulbs (hortilux i think) that have more blue in them.

make sure the dark is dark (aka NO LIGHT WHAT SO EVER) as this can lead to problems, including hermaphodites!


-shake