The medium is a mix of what I had lying around: hydroton, landscaping rock pieces, perlite and peat. I am going to see how it does with no PPM metering and no PH adjustment. Water is 1 part city very hard water and 4 parts reverse osmosis water. Nutes are bulk, dry E-Bay generic.

My lamp is an inverted 5 gallon bucket painted white inside with a small (one or two quart?) plastic flower vase also painted white to act as a focuser. I have large holes drilled in the base of the bucket to let the heat out and I have some 1 * 1 wood scraps between the buckets to let fresh air in. Will upload a pic. It is very bright and the plant gets almost all of the light. Will probably keep it in there until week 3 or it gets too big. I designed this because i do not have a separate veg room. 23 watts is about the max heat for this setup. Am also going to do another with 10 to 20w of white or blue LED(s) to compare growth rate and heat level. As to kelvin, I have noticed no difference between cool white or warm white, so use whatever you have. This bulb is 2700K rated at 1750 lumens, I believe.

If anyone wants to try my lamp design, be sure to let it air for several weeks after painting or the fumes will kill the seedling. I also have another bucket with a reflector which I will show and can be used immediately. I cannot say which is brighter without a light meter.