The max on a Y splitter is 660 watts. The max on the light switch is 120 watt.
4x18w 2700k CFL's = 70 watts.
What Im worried about is the CFL's touching the box and catching fire, or the Y splitters not being able to handle it for some reason. Thanks!
the splitter is fine about the bulb touching the box it shouldnt do any damage but just inspect it ever so often to see if it starts to burn just for safety