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Introducing CobKits.com - specializing in DIY and Citizen COBs

Discussion in 'LED and other Lighting' started by CobKits, Aug 2, 2016.

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  1.  
    Shua1991

    Shua1991 Member

    I want to replace 2 600w lamps in 2 4×4 tents without sacrificing much or any yield, and I've got about 1.6k budget, any recommendations?
     
  2.  
    war74u

    war74u New Member

    Hello i registered to this forum just because of these great cob threads on here. I have exactly this setup of the Clu058 and the meanwell HLG-240H-54B. I will do some measurements these days. I thought i could drive the 1825 to suck at least 190w.
     
  3.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    False. please start your own thread with your thermal runaway scenarios (or look back at the threads where all this was covered 2 years ago)
     
  4.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    if you DIY it wont cost you that much to replce them 2 x 400W @ about $800-900 total, or you can put 600W in each 4x4 and yield more (~$1100 total)
     
    Shua1991 and Rp1972 like this.
  5.  
    war74u

    war74u New Member

    would the hlg-185h-48a a better driver to push the clu058 instead?
     
    pop22 likes this.
  6.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    its a good choice if you want onboard dimming

    240-54B offers remote dimming but you lose a little output current
     
    pop22 likes this.
  7.  
    GrowLightResearch

    GrowLightResearch Active Member

    Key phrase being "manage to function". The question is how well do they function and could you do better by driving them properly. 35 years ago I was using Sylvania GrowLux bulbs and they did fairly well. Could I do better than GrowLux? Yes. Do GrowLux function? Yes. Your anecdotal evidence is of no value.

    I really like what you have done with the Samsung strips. So much better than your former DIY CoB fixture.

    Samsung has an advantage becasue they can use Vf binned LEDs where the Vf is tightly matched. The best binning Samsung offer the general public for LM561is 300mV.

    I do not use outdated info. I ran more tests a couple of weeks ago with CoBs and with strips back in March. There are no paper written say it is okay to drive CoBs or strips in parallel. There are plenty of papers from reliable sources saying NOT to drive them in parallel.

    Just because they light up does not mean they are not unbalanced. Measure the forward voltage and current in the individual strips.

    I typically design strips to operate at 48V and use 54V HLGs and HEPs. In my lab I have just about every 54V HLG Mean Well makes. So when I said they run up to 60V that's because I have measured it many times. I manufacture my own inexpensive buck drivers which can be powered with CC or CV power supplies. I also use Texas Instruments LM3466 to balance the current in multiple strips.

    No one here has offered anything supporting parallel wiring.

    Idiotic remark,save them for someone that might give a shit..




     
  8.  
    chuckie86

    chuckie86 Well-Known Member

    Hey buddy I have 3-8 cob kits listed on eBay for sale I got all the parts for 2 of them from cobkits but yea saling mine and the work awesome and I run 8 citizen 1212 in my one 4x4 and work great well good luck on finding lights cobkits will get ya going at decent price is
     
  9.  
    war74u

    war74u New Member

    Thanks for your reply, i got them both the 48a is planned to use with 2 veros i am now just thinking that the 240 54b is better used for two of these citizen cobs, cause of the limited output on one.
     
  10.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    everything went well, i snuck back in today, all orders placed before noon today are out
     
    OLD MOTHER SATIVA and pop22 like this.
  11.  
    pop22

    pop22 Well-Known Member

    Might be good to take it easy for a day...lol!

     
  12.  
    cadkushfan

    cadkushfan Member

    black friday sale?
     
    pop22 likes this.
  13.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    lets call it black saturday
     
    pop22 likes this.
  14.  
    Shua1991

    Shua1991 Member

    I'm just wondering where I should purchase the frames for these diy LEDs, would any Lowe's or home Depot be sufficient or are online retailers more likely to have what I need for a cob setup? Likely to make the purchase tommorow or monday. Should I pm you CobKits?
     
  15.  
    Cedru

    Cedru Member

    @CobKits - any idea when/ if you will ever get the qb304 in 3000k in stock?

    Thank you,
    *.*.* Cedru *.*.*
     
  16.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    no need to pm, email is better

    home depot and lowes have aluminum but its usually cheaper to call up teh local metal supply place and tell them you want 3/4" x 1/8" 6063 aluminum angle cut to length. they generally cut fro free or cheap
     
    Shua1991 and pop22 like this.
  17.  
    Dave455

    Dave455 Well-Known Member

    RapidLED has canopy frames different sizes available.
     
    pop22 likes this.
  18.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    Black friday weekend special #1:
    Free 120mm clu058 heatsink with all clu058 chip purchases
     
  19.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    pop22 likes this.
  20.  
    CobKits

    CobKits Well-Known Member Rollitup Advertiser

    pop22 likes this.

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