Broke a lense anyone use plate glass

Broke my grow light lense today. It was tempered glass I was wondering if I could cut a piece of plate glass for it instead. My reflector doesnt have a name on it so im not sure what brand it is to orer a new one. Its 11" by 21"

Thanks and you definately cannot use plate glass. I cut a piece and slid it in 3 minutes later it broke in half. Lession learned.