Mh and hps has blinded me over decades, my led dont dim so l cut back hours to 16 in veg. At top of tent, drop down to 1ft for flowering, let them grow into it, only raise if necessary. Dont find leds as bad as hps. Cmh no idea but think its like hps and mh cross. So not good for eyes at all. Spectrum leads my opinion here. And only spectrum. Blue burns eyes more than red and ir which we feel as heat. Blue isnt good for eyes, uv even worse.