I'm pretty sure the Apollo series is all 55watt. Some of the other KC's (and other brands) are higher - 100w, even 130w.
If you intend to run them on pavement, check your local regulations, many 'off-road' lights are not legal to run on pavement.
If you haven't already, you may want to check on this thread
. It was only started a few days ago, so there isn't a lot of info there yet.