Yea they call it as cool tube. I will just stick to the LED alone for now. Will see if it starts to curve again . Thanks a heap mate. Was so worried when the temperature raises till 40.1C!180 watts of LED is plenty for seedlings. 400w HPS is going to be super hot in a small closed tent unless the ambient temperature is downright frigid! they sell these tube looking things that attach to the light and go around the bulb that you hook vent hoses to that suck away the heat. i forget the name but you might want to look into it if you're dead set on using that light in a tent.






