500-600w of quality whites.
Such as
HLG
Timber grow lights
Grow light Australia
cutter.au (solskin)
Lumatek
ChilLED
Rapid LED kits
Sure theres more .
Maybe check out migro on youtube and see his testing.
Its probably gona cost you $500 minimum up to $1200 depending on what direction you go.
Or upgrade from 315 to 630cmh
DIY wise two of these and two xlg 240 drivers would be reasonable cost effective without doing a full build yourself
QB 288 V2 R spec with Slate 2 Double Combo
horticulturelightinggroup.com
Assuming your in the US