Introducing LED boards that beat COBs

[LemonadeJoe]

@21stg.com

Is here anybody who have tried these led chips before?

I think @Baudelaire experimented with some samples of Samsung LM561C chips:

DIY Grow Lights with high-efficiency LED strips

I see a lot of folks still trying to grow with off-the-shelf “blurple” LED lights. This discussion thread will explore a vastly better alternative, using mid-power LED strips to build your own lights that will deliver better spectrum and far more lumens per sq. meter, at 50% better energy efficiency, for less than half the cost per watt of commercial fixtures. The key to pulling this off is using recently introduced high-efficiency mid-power LEDs mounted on rigid PCB strips, mounted on simple a…