Interesting. I've been eyeballing a boost-driver D1 for a bit, but after seeing the SC65c thermal throttling and knowing how quickly most Noctigon and Emisars step down due to heat, I might go for a DM11 since it has a bigger head, and will put more lumens "on target" with the TIR. My larger lights are all bucked/boosted and are set up for reasonable sustained output instead of being 30 second hand melters