I've learned through my readings and conversations that you want the kelvin temp of your cfl's around 6500. I am using 2 65w cfl's on 4 seedlings and they are responding great.

nice, I'm thinking about giving them 4 100W cfl's with the 1000w hps... hope that works out good and is more then enough light for 10 plants minus the ones that don't make it if any.

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are you going to use a T5?

what is t5 exactly?

edit: just read it... I would if I had a smaller space and or the resources to buy 4 of those but I think I will go with normal cfls. mainly only for the veg then maybe for some under lighting. Do they really help for flowering or will the hps alone be fine?

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Cool tubes (or equivalent) are highly recommended for using HIDs in a small space. i have a 1000w of light (600w HPS and a 400w MH that burn through the whole grow) and in the winter - no problem keeping things cool (with air-cooled fittings) but in the summer - even with an exhaust - it can be a struggle.

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Without cooling tubes,glass plating and extractors your plants will fry in a cupboard with a 1000watter and a few cfls the heat would be unshiftable with 2 crappy fans unless the door to the cupboard was left open all the time

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yeah I'm going to get a cooling tube to just remove the heat from the bulb out the closet. with a fan between the bulb and the plants to get it even closer. I can actually leave my doors open if i wanted but I'm shooting not to.

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your 1000w is all you will need in closet if its a standard sodium lamp i would advise to change to a growlux or a son t planta etc theirs a few to choose from instead of adding cfls or t5s as these have been developed for growing and have extra blue in light in spec are good for veg and flower just use cfls or t5 on seedlings i grow on 600w from seed to finnish dont put your seedlings under hid its took me ages to get wright but if u do start on hid about 5 or 6 foot above the seedlings and lower gradually first grow would use 2 4ft t5 tubes for seedlings after 2 week put on hid

what kind of wattage will I need in cfls to grow the seedlings under? I suppose I would want to grow them for a week before I put on the hps since it could damage it. Max height I could be from the plants at start would be like 4.5' is that enough of a distance to grow the seeds under or is that harmful?

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garden knowm started a thread about starting seedlings under HPS and there are a few of us who do it and have success. i can't seem to find the thread now but i'll try to look for it...

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