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Looking for advice on led cobs


greencloud
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  • 2 weeks later...

For me the cheap Chinese COBs have been a better upgrade from my HPS.

I used 250w HPS with lumatek ballast for many years, but within last year changed to COB. Before I got around 0,5-0,6g/w with 250w HPS and now I get 0,9-1,1g/w with 217w COB. 

If you live in Europe and would like some cheap COBs tell me and I'll send a link from AliExpress which ship from Germany (so tax-free in EU). 

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populargrow CREE chip 400W full spectrum COB led grow light for hydroponic greenhouse tent commercial medical plants growth
http://s.aliexpress.com/MnY3yAju

 

It is a great light that use Cree cxa3070. I use two of those lights that are actively cooled with fans. They don't sell heatsinks, but I found these heat sinks that look great 

 

COB CREE CXB3590 Bridgelux Vero29 gen7 Citizen clu048 1212 LED heat sink Aluminum 180mm pin fin pre-drilled 100w heatsink  
https://s.click.aliexpress.com/e/b9vGxHuU

 

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  • 3 months later...

COB lights are not the only metric that determines the quality of a grow light. You need to look into input watt vs output light. 

I found a source that elaborates on what makes an led grow light efficient. I found it helpful cus it cuts through all the bullshit adverted watts and etc. The design of the leds are quite important factor to consider also. read more for yourself here is the link

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  • 5 months later...

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