Light Spectrum Chart

[SmokeRich211]

It's amazing light, I'm using SP-250 now.

Right, I also used it for my 4ft*4ft tent, 2 units SP 250 now, first growing

 

[Madsen122]

This link is a nice resource for measuring tools and information on PAR (Photosynthetically Active Radiation) (400-700nm) and DLI (Daily Light Integral) as you look at the best lighting regimes for your set-up.

https://www.licor.com/env/products/light/greenhouse.html