# 12V regulator for 100W LED

I want to make a 100W high power LED headlight for bike, but the problem is that LED releases a lot of heat, and I'm using a 150W boost converter to convert 12V to 30V ( minimum operating voltage of 100W LED), to reduce the heat I have to reduce the current to 1A(from battery it is 6A), and for that I'm thinking to use l7812 which is a 12V linear voltage regulator but, it will not be able to handle that much amount of current I think so. Can I ue linear voltage regulator or sothing else? I'm experienced with printing PCBs using toner transfer and also with soldering. I'm confused what to do please suggest me a solution LED specs- 100W 32-35V 3000mA Genesis's 30Mil

• Why do you want a boost converter and a linear regulator? Why 30V? Obviously you're aware that if you have 1A at 30V that's not 100W any more? What's the power supply for all this, batteries? – pjc50 Jul 28 '15 at 10:01
• If I read your question as it is written now, you boost 12V to 30V and are asking how to solve turning that back into 12V with an LM78-series without the heat. I'd think not boosting the original 12V would accomplish that. – Asmyldof Jul 28 '15 at 10:02
• Boost converter because 100W led operates on 30V – Tanishq Jaiswal Jul 28 '15 at 10:03
• Can we get LED specs? How did you get that the battery you will draw 6A? That is entirely dependant on the load. – Josh Jobin Jul 28 '15 at 10:12
• When I connect the LED with boost converter in series with my multimeter then I get that reading – Tanishq Jaiswal Jul 28 '15 at 10:15

A word of caution about mounting a 100 W LED on a bike (I assume you mean bicycle): you really want to make sure that you have appropriate optics and diffusers in front of that LED so that the light comes from a large surface area (like car headlights) and not from a very small, 1 cm$^2$ point source. Otherwise you will badly blind anyone coming towards you, maybe even damaging their retinas, possibly causing an accident which may also involve you.