A CFL can get hot enuff to melt anything, but it depends on the actual true wattage.

My 125W bulbs will leave blisters on my arms, but my 55W will not.

You can always lay some water heater blanket material betweent the bulb and the plastic. The heater blanket will insulate even from the heat of a MH or HPS

Superthrive is a great stress reducer / preventer and it couldnt possibly hurt your plants at this stage.