There's been lots of discussion of lights and lots of opinions. I will say one thing for certain, you will most probably not find what you are looking for at Home Depot unless you can live with a 4-tube t8 florescent shop light. That's the best they have to offer. Try shopping here
2 to 200 Watt Compact Fluorescent Bulbs : 1000Bulbs.com The Light Bulb Superstore. I use both the 55 watt models and the 105 watt model all in "full spectrum". I also use a fixture with 4ea 48" t5 florescent tubes over my orchidarium. Here is my upstairs grow area with lights on
and the orchidarium with t5 setup
Now I know many members here grow under less hi-tech lights, but I have tried and rejected lots of types of lights over the years as having faults I couldn't live with. Just my two cents.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)