Hi all, in the past I’ve simply put a small piece of copper under the pcb if the beam was disappointing after a mod on the few lights I’ve done so far. I’m totally new to modding, but after searching the forums I haven’t found a good method to focus an led in a reflector other than just trial and error of moving it deeper into the reflector. Basically all I do currently is move the led as much as I can to eliminate a “donut” in the middle of the hotspot, but I don’t really know how to focus it for best throw or the best beam possible. Can anyone offer a quick sketch of how to focus an led in a reflector? What about lights (often cheap onces of course) that have the pcb sitting inside the reflector itself instead of the reflector on top of the pcb? I’ve never had one that has this setup and has mutliple led’s on the pcb. If multiple leds are used, do they all focus and make on beam or is it a scattered mess? Is there a different process when using dedomed leds like an xp-l hi or homebrew dedomes? Is it much different when using something with a huge dome like an mt-g2? Does having a light meter reduce the time it takes to focus the led, or does it just make it more reliable? Im not looking for the trade secrets of those who build and sell such amazing lights on this forum, just a very basic outline of what the goal is in using a light meter or not using one to focus the led. I don’t have a problem getting a meter, they seem to be around for $20 or less. I just wouldn’t even know how to use the thing once I get it. I’m mainly talking about lights like a basic C8. Could someone please briefly go over how they’d focus something like an xp-l hi, or a smaller xp-e2? Are there significant differences in the process when dealing with different size leds and with/without domes please? I’m sorry if this question’s already been covered elsewhere, I feel like this might be a common question, but I appreciate the responses and direction. Thanks.