Hey ther! I am a technology teacher, 8th grade I should know all this stuff, my basic electronics course taught me how to use a multiple meter, ohms law, circuit board design, with etching using acid bath(fun) and I enjoyed it all, I will learn more about lights and research info thru you guys and maybe teach my school kids a unit on lighting tied into energy conservation, another teacher bought a 5 million candle power beam, expecting to power a small solar panel to run a 10 inch solar car, he was disappointed, not enough heat, I would like to help him with that issue, perhaps it's kelvin measurements or magnification lenses that must be addressed?