Ive been lurking for the past few weeks gleaning knowledge from previous posts but the time has come for me to show what ive rigged up and ask for some advice

I have a chinese elm which came to me a few weeks ago with scale, maybe mites and mildew. I sprayed and fungicided and all seemed well. I have placed it in a very large south facing window which when sunny gets fabulous light, however the past week has been wet and cloudy and my elm has developed a lot of yellow leaves. I guess its been a bit too dull and possibly a little upset by moving here and being sprayed.
Im trying to get to know how it likes to be watered but it is possible that I have overdone or underdone it slightly.
I didnt want to take any chances so I have rigged up a light system to help it out and maybe lengthen the daylight hours at least.
Here is what it looks like at night to show the light spread:
[img]https://i64.photobucket.com/albums/h174/DaezD/IMAG0051.jpg[/img]
[img]https://i64.photobucket.com/albums/h174/DaezD/IMAG0048.jpg[/img]
Its a cfl 20w bulb. I would really appreciate any advice or tips you might have on my set up until I can get this tree outsiede in the spring and hopefully let it rest next winter.
Thankyou
