I'm sure that if anybody from the U.K. reads this, that they will be more than happy to test your laser for you & give you the out-put reading if you'll pay for the S/H. Heck if the guy has a meter that will graph the results, he'll probably provide you with a graph sheet of the out-put, taken over a period of time, all you'll need do is ask him to test it over 60 seconds or 2 minutes or whatever. You may even find out that the guy lives only a couple of miles from you Just ask nicely & pay for the S/H comin' & goin'. You'll find that for the most part, the people on this Forum are sort of like one big family, & generally if you ask nicely, somebody will be ready, willing & able to help you out
rob