Okay, I finally got around to trying out the bulbs, and man, I had forgotten what a difference it was...

Here they are (I think the attachments will show up in this order 50W halogen, 20W halogen, two 4W LEDs, and one 4W LED. It looks like two LED bulbs easily match the output of a 50W halogen, at 1/6 the power... pretty amazing.

Also, the 20W halogen was marked as 36 degrees, and it looks like the rest are close to that... maaaaybe 45 at the most. 36 degrees is a standard medium flood pattern.