Based on your layout, you probably want to have your PAR set to about 200 , maybe a bit less, at the the level the candy canes are at, to keep around 100 to 150 on the sandbed.
I recommend lux meters to folks as a basic guide. For led take lux and divide by 60 as an estimate. IE 20,000 lux = 333Par.
If you test the level on the top of the tank I would probably estimate on that tank you want about 25,000 lux. (about 400 par)
You could almost definitely increase that slowly over time as the Nutrients and alk allow.
Keep in mind it is still trial and error to a small extent weather using a par OR lux meter to see what your tank(and individual corals) prefers the given light levels.
Were it my tank
Acclimation is pretty darn important, and as you can see many folks keep the same coals at different par levels. IMO, when acclimating corals its two things, allowing the animal to get used to the alk Ph and nutrints in the water etc and also the light levels. One the coral has been in the tank for a time it much easier to move them up and down for light. (i have xenia at the same level as acros).
Another reason I REALLY recommend an inexpensive meter is A mars aqua at 12in will give you more than 1000 par.
You can get a lux meter from
amazon for $14 or water proof milwaukee one for $75. If you want you can put the $14 meter in a ziplock bag.
