Actually, yes. I had substituted BEP photo-flood lamps which are R30, 300 watts and have a 4 hour life. The effect was nice and due to the low duty cycle, the 4 hour life was not a problem. Don't know if they are still made.
Now THAT's a pretty picture. M2K gobos and all....This was posted on the light network a few days ago, not being used as blinders but still providing a nice effect. http://www.guyrhodes.com/photo/chester0603/pages/chester_moody.html