Hot light for propagation chamber help needed please?

[kg5]

Have just sent out a number of emails to find out more about how waterproof bathroom heating lights are, here's hoping!

Looks like am using polycarbonate sheeting with timber framing. It will give me a propagation chamber 2m x 1m x 1m. Have a 2m high shower glass door with a sealing strip that will fit around the door.

This chamber size should be able to be adjusted, with other light fittings that are more designed for seed and cutting propagation.