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  1. P

    Some help with DIY Cobs, reflector and lenses

    Can you please elaborate? A statement should include some backup, specially if the topic relates to science stuff. May be try reading this: https://www.rollitup.org/t/diy-cob-reflectors.854312/ Also do some research and try to learn what PPDF is, then google "LED optics explained ledsuplly" and...
  2. P

    Some help with DIY Cobs, reflector and lenses

    Anything about the reflector?
  3. P

    Some help with DIY Cobs, reflector and lenses

    Thanks for the reply. It heats up to around 50°C at touch, but irradiates much less heat. That's how your average CPU heat sink works, or the one you find in a standard HPS light ballast. Sure it feels really hot at touch, but most materials have no issues with that temperature. Still, this dude...
  4. P

    Some help with DIY Cobs, reflector and lenses

    Greetings folks I got this DIY Cob grow light from a guy who sells them pretty cheap. 200w, 4x50w COB, a big ass heat sink and 2 PC fans. You can get the picture of its size based on the images. Quite powerfull for the price, but I think it need some improvement. After some research, I...
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