Quite a few.. I actually light my shop with them sometimes, I point a red, green and blue laser at a single spot on the ceiling (I know, total laser geek).. I've got a few lower-powered lab modules that I bought to kill, so they're the ones I run a lot.
Maybe its just me but having my scanner and always upgrading it from a phr to a ggw and now here comes my 445nm laser, i seem to use them for more than 30min a day.
Even more now that the new lasers come i think i will have to replace my 50-75mw of green.
those beams above my head make my day.
You sound a lot like me as I enjoy planning and building just as much if not more than using them. I do love to use them though ESP the WFTM now on that I have 10's of hours of use in just a couple months.
Anyway, 2+ hours, I'll literally just pic one up (my dead red lol) and shine it for a few seconds to a minute, then put it down and go back to whatever I was doing. It WILL be 2+ hours in a few hours once I have a working laser again. Right now it's dead, but when it was working.....lol 5 hours a week.
EDIT: No it's not, 11:11 is the last time I last visited lol.
Totally depends. There might be a week where I don't even mess with any lasers and some days spend hours if I have a project. Just a few days ago I spent 5 hours with lasers when making my latest video because I had trouble keeping the right amount of fog and taking the best clips.