ATI's AB+ spectrum, which Ecotech emulated in their lab and then Bulk Reef Supply and everybody else in the ocean emulated after that, is a well tested spectrum, albeit on the blue side aesthetically:
With such a shallow tank you are going to want to run your daily maximum at a percentage of each of those levels to start and then very slowly increase them over the course of several weeks (once corals are in, not before then). Maybe start at 40% times the final value for a maximum, so 0.4 x (119, 116, 79, 80, 4, 4, and 19), or:
| 48 UV |
| 46 V |
| 32 Royal |
| 32 B |
| 2 G |
| 2 R |
| 8 W |
(Those are the peak values for the day). A good lighting schedule would be to start at 0 across the board, ramp over 2 hours to those max values, sustain max for 4 hours, then ramp down over 2 hours. Eventually you may want to extend that duration a bit, but that would be a good starting point to avoid an algae outbreak. In terms of intensity, I would increase each channel only by a few percent every week until you start approaching 100% for the UV and V channels. Depending on what you keep will dictate whether you need to be lower or higher than that in the end, but that is a conversation for another day.
Note, if you are fish only or no corals for sometime, I wouldn't run the lights for that long nor that intensely, as you will only be feeding potential algae until there are inhabitants to compete for nutrients. Maybe just a couple hours a day for your enjoyment.