chuk hell said:
I have a cheap grow bulb and a CF bulb in clamp lights on a timer ... on 14 hours a day...about 12 inches from sprouts.
I hope you mean 1-2 inches instead of 12
Also, what do you mean by "grow bulb"?
I have a wee bit of experience gardening under lights, CFLs & T5 fluoros in particular. Keeping the bulbs no more than 3 inches away from the plants is key to getting good growth with minimal stretching. The plants will stretch enough once they're transplanted, no need to start them off leggy.
See how short and fat the seedlings below are? The largest leaves are as big as my palm. It has been 1 month and 1 week since I planted the seeds in the peat plugs. They are growing under 2 2 foot T5 fluorescents that are never more than 2" above the tops. (Red Savina = left, Caribbean Red = right)
Light obeys the inverse square law, meaning that if you double the distance you quarter the light intensity. Therefore a bulb that produces 2000 usable lumens @ 6" will only have 500 usable lumens at 12". Keep in mind that a fluorescent light will not burn a plant unless it physically touches it.
Since they run cool and you can keep them within inches of the plants, fluorescents are ideal for starting and growing seedlings. Remember, cool blue-white(6700k) light is best for seedlings & vegetative state. The warm-white(2700K) bulbs will work, but the plants might be a bit leggier.
Also, an oscillating fan is a MUST HAVE item for any indoor growing, even if it is just seedlings. Set it so it goes back and forth across the plants and blows just hard enough to lightly shake them. This causes the main stem to thicken up, if you do not do this, the stems will be considerably thinner and weaker.
Click here for a good primer on a lot of things one needs to know about grow lighting, fluorescent & hid