65 Watt Outdoor/Enclosed CFL Lights?

Would 2 65 Watt CFLs be enough for a box 5'X22"X20, 1 to 2 plants? I believe these type of cfls are called "Double Circular" or "FML", they are flatter rather than round. The fixture is for outdoor use so the bulbs are behind glass which I hope will control any heat worries in this small space. I'm a newb so and advice would be Greatly Appreciated! Thank You.
 
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