Silicone light covers will not melt even if used while lights are in operation.
HID lights have a characteristic blue-white color, around 4500-5000K. Very sturdy, excellent for extreme applications. Trail Tech HID lights have no remote ballast to be installed. HID requires DC power. 3 times brighter than halogen per watt.
Halogen lights have a characteristic warm yellow color, around 3200-3500K. Available in a variety of mounting options and wattages. Halogen lights can run on AC or DC power.