Probably best design would be to use 3 strips per tray, unswitched, and a remote dimmable driver (ballast). Then you could dim down the whole tray by 30-50% for veg, and run full open in bloom. The Mean Well HLG and ELG 24 volt constant current drivers have dimmers suited to this purpose. As I think about this, the 4-tray design, with 3 strip per tray, is the 600w HPS replacement you are looking for.
One thing you'd probably find out right away is that the reduced waste heat from the strips might create a different kind of "heat" problem for you - lack of it. I switched over to LEDs first in the winter (milder than Britain's). Two weeks later I was buying heat mats for the first time ever, as my soil temps dropped from 75F to 55F.
As for the ultimate question, do they grow the sticky-icky dank in weight like a Hortilux 600? Time will tell on the SolStrips, but very good results are being reported - and photographed - from the Samsung boards being produced by HLG and others in gardens of 50-100 s.f. where 600s hps once ruled. The SolStrips are the same Samsung chips, arranged on a strip rather than a square board. Three strips equal a Quantum board in output, with the SolStrips having a higher density (chips/mm2).