sounds like you could checkout the HLG 120 series.
https://www.meanwell.com/productPdf.aspx?i=309
36 or 54V ones, 2 or 3 in series, other groups in parallel.
(edited, wasnt correct).
or
https://www.meanwell.com/productPdf.aspx?i=310
C700, and all in series.
f.e. 9x19.5Vx0.7A makes 122W.
dont...