love those little trees in the pic
I think I have a sunleaves reflector that actually has a square footprint, but I do agree that 90% of hid reflectors give you a rectangular footprint. There are also the parabolic ones.Do note ur reply is in the footprint of the bulb not the actual light
and one more important fact many over-miss is the footprint of 'most' HID lights
...its rectangular
good luck