Reading the comments in the article it seems that some people using a lot of 420nm have bleaching problems. Also the math used in the article seems bogus.
Regarding adding 60 to 80 watts of flood led
lights it might not fly as the cost will be over 120$ with the extra actinics and I still have to DIY some fixturing so they fit on top of the tank.
Might as well just get the taotronics or DIY led
kit. But somehow I still like the idea of mixing actinic t5 and led
Anyway I'm a bit putting the cart before the horse as I first need to get my nitrates under control before of thinking growing basketball size corals.