1. Bud of the Month: Squish / No name plant
    Dismiss Notice

DIY Cree LED grow light

Discussion in 'DIY Forum / Technical Articles' started by bombbudpuffa, Mar 14, 2017.

  1. Mar 14, 2017 #1

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,885
    Likes Received:
    4,621
    Supplies-

    Cree chips-ebay
    Aluminum angles(for the frame)-hardware store, tractor supply, etc
    Drivers for the leds and fans-ebay, you can buy mean well but you're just paying for a name.
    Heat sinks-ebay
    Wago connectors-ebay
    Adhesive thermal pads-eBay
    4/40 screws-eBay, this is the size I'm using cuz I have a lot of them

    Tools-
    Drill
    Rivet gun
    Soldering iron

    I'll probably be editing this and adding more supplies so bear with me.

    2017-03-11_12.37.34.jpg

    2017-03-11_12.36.55.jpg

    2017-03-11_12.35.16.jpg

    2017-03-11_12.36.04.jpg
     
  2. Mar 14, 2017 #2

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,885
    Likes Received:
    4,621
    This step is easy. Just decide your dimensions, my light is going to be 4ft x 4/5 inches, cut your aluminum angles to match your dimensions, drill holes in the corners and rivet them together.

    Next step is adding the heat sinks to the frame. I'll upload pics to that step in the morning.

    2017-03-13_17.57.27.jpg

    2017-03-13_17.56.40.jpg
     
  3. Mar 14, 2017 #3

    RubyRed

    RubyRed

    RubyRed

    Well-Known Member

    Joined:
    Apr 8, 2014
    Messages:
    589
    Likes Received:
    1
    pulling up a chair

    :48:
     
  4. Mar 15, 2017 #4

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,885
    Likes Received:
    4,621
    This step is fairly easy. My heat sinks are 6 inches x 3/4 in so I just put 6 of them side by side, drilled holes in the frame then the heat sinks to match and screwed and riveted everything together(I'll use rivets for the rest of these because it's easier). This block is going to hold 18 3w chips and I'll have 5 of these along the length of the light for a total of 90 3w leds.

    The heat sinks will also make the frame more sturdy.

    2017-03-15_12.03.47.jpg
     
  5. Mar 15, 2017 #5

    screwdriver

    screwdriver

    screwdriver

    Chopperest Member

    Joined:
    Feb 17, 2010
    Messages:
    209
    Likes Received:
    8
    Gender:
    Male
    What is the spectrum you are using for this light?
    Used for flower or veg?
    Are you aiming for passive cooling or fans for each section?
     
  6. Mar 15, 2017 #6

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,885
    Likes Received:
    4,621
    I'm going to have blues on a driver, reds on a dimmable driver and far reds and uv on a driver, each with their own on/off switch. I'll be using a crazily wide range on this light. 90 chips so I can really play around with it.

    I'm going to have to use fans. 18 chips on those lil heat sinks will probably get really hot. I'm thinking about putting dimmers on those so if I don't need to run them full speed I can adjust them but not sure yet. I don't have a plan just modifying as I build.

    Any suggestions?
     
  7. Mar 15, 2017 #7

    screwdriver

    screwdriver

    screwdriver

    Chopperest Member

    Joined:
    Feb 17, 2010
    Messages:
    209
    Likes Received:
    8
    Gender:
    Male
    It depends on the grow area shape, but it might be neat to be able to swivel a group of leds in a different direction to get a different light spread.

    Switches or dimmers, I wanted to do something but my light is so small I nixed the idea. With your light I can see an advantage to doing something.

    Cooling, possible to form some ducting over the heatsink and vent out of grow area or use fewer noisy fans.
     
  8. Mar 16, 2017 #8

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,885
    Likes Received:
    4,621
    I'll be using it in my 4x4 tent. I wanted it to be slim to fit between my 2 400w lamps.

    You still could've added switches and dimmers. I think it makes the lights look cool to be able to dim them.

    I'm just going to use computer fans. One fan per heat sink block. I think that should be sufficient. Maybe 30cfm...those should run quietly.
     

Share This Page