Used some of the with 500 watt lamps to replace some ancient par 64s in on a medium sized village hall stage. Installed some Stairville short par 56s with them. The end result was far supior than the old par 64s as I always use 500 watt lamps in these now. The advantage the Stairville par 56s have over most other brands is that they are rated at 500 watts, most are only rated for 300 watts. If you have given up on par 56s as not bright enough, try this combination as it really works. Great value cans!!