This one.
Might just be a psychological thing because the light is purple and not white, and I don't know how long it should take before I see any changes but so far I'm not.
Here's a pic of my setup, and the bulb I bought.
http://www.amazon.com/dp/B01ELZ7IKO
Not real happy with the lamp I bought, the hinges are too weak to hold this heavy bulb in any other position.
So you think direct sun in the morning is better then lower light all day?