sounds like you think all diodes are the same, which is most certainly not the case. osram ssl have extremely high flux (and their even better horti series just came out and will be in the CLW soon if not already). despite the fact that the light is a 'blurple' it has a full spectrum for plant development
heres what the spectrums look like on that totally tunable light:
https://www.rollitup.org/t/3-clw-so...cxb-3590-diy-kits.919164/page-4#post-13014895
despite the fact that its only 1.55 umol/J PAR the colors are centered on the more efficient areas of photosynthetic activity so its YPF is higher. The only problem ive ever had with these is that they are way too intense and will stress plants if run above 40 w/SF. they are solid lights built with great components from a reputable company who stands behind their product and makes almost all of it in america. and i dont sell them so take that as an impartial endorsement. the build quality and features that light has for under $2 watt is a great bargain imo. you know you'll get 5-10 years out of it unlike a chinese blurple with cheap drivers and diodes of unknown origin