The claim of 225W equivalent equates to about 4500 lumens. I have no way to verify this but they are very bright. I've had 10 of them lighting the main sanctuary in our Church (inside 12" globe) for almost a year with no failures.
This bulb is 9.5 inches tall and 3 inches diameter............it does not get very hot, but does put off a little heat. I have used mine about 6 times for a photo setup to take pics .....I generally have had mine on at about 30 minutes at a time. I use mine in a metal type light reflector on a stand that came with my photo setup. This was the bulb that came with my photo setup and when one of them was bad, I replaced with identical bulb.
I'm not sure about your question...if your interest is photographic, 5500K refers to color temperature emission of essentially normal visual range... A 6500K color temperature will produce a shift to a cooler range of colors