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Here is the whole article for the NFET+NPN+2R current regulator if somebody wants to use PC or any other DC psu for driving LEDs: http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/ It cost less than 1euro/st, but you need to use it for all string. I've used and liked it. The...

Im going there, but is there anybody here who use homemade LEDlamp?

Hi! I live in Budapest and we can buy the weed for about 8-10usd/g. But 1g is realy 0,6-0,8g, it depends on the dealer...