i can't tell what that light is from the picture but I would say get rid of it unless you can figure out what it actually is. you need to get an oscillating fan on that plant, it will help with several things including air circulation, strengthening the stem, and keeping temps cool.
Those cfl's need to be a lot closer to the plant. To figure out how close you can get them place your hand directly above the plant and then lower the lights as low as you can while still holding your hand there comfortably. Those bulbs shouldn't get too hot so you should be able to get them really close. The bulbs need to be directly above the plant, do not place bulbs around the plant. i would also put the cfl's in some type of reflector(like the one that is hanging) to help with wasted light since it looks like you are growing in a very open area. Personally, I would move the plant really close to that corner behind it so that you can maximize your light coverage.
The plant looks healthy from what I can tell in the pic. Do not remove the damaged leaf, do not remove any leaves during your entire grow for that matter. When/if the leaf completely dies the plant will shed it, until then she is still using it.