hmm, there isn't any particular light intensity commands, just the set light range commands. The default light 0 is usually the strongest, i guess the only way you can make a light appear bright is by redusing the ambient light even more, maybe even to 5 or 10, also try colouring the ambient light dim grey like rgb(50,50,50). I think that should work 'cause it's the way i do my lighting in my stages.
your birth was a blessing, sent to live and die on earth as a lesson, we each have a star all you have to do is find it, once you do, everyone who sees it will be blinded - DMX