Wiktionary
superlight
a. 1 Extremely lightweight. 2 Faster than light speed.
Usage examples of "superlight".
Curling toward the starboard side of the hull, she let the thrum of the superlight engine and the odd slip vibration lull her back to sleep.
The distance between the two men was something over twenty-three hundred miles, and also normal vision was of scant use at superlight velocities.