Hey, I was surprised when I couldn't find these addressed anywhere. Americanaquariumproducts.com STRONGLY endorses them but I don't know anyone with firsthand experience, do you?
If I'm not mistaken, SHO stands for Super High Output, in the same vein as NO/HO/VHO. It's a type of screw-in compact fluorescent bulb, though I'm not sure what the difference between a SHO bulb and a regular one is.
would be ok for smaller tanks but on smaller tanks i would just get a normal hood and put cfl bulbs in there. i am sure its cheaper. in larger tanks really even with so called good reflectors still better to get reg t5 or cf less restirke.