W.I.P=Work in progress=not finished. Yep, I have put 2 hours+ into this and i'm not even close to being done.
My suggestion...is... Take two very bright purple colours (each a diff. shade), and use a gradient MAP of them. =/ Then put it on screen and lower the opacity to like 10-30. Then use a selective colour or 200 PXL soft, white brush to make a light source. :) It's pretty cool dude. I can tell this is probably one of your best. ;)