Hello all,

any help on this?

thanks

The actual can placement will depend on whatever is above the ceiling board -

1. location of the ceiling joists as well as the direction they run
2. HVAC ducting/ plumbing lines
3. If the space above is the attic, the pitch of the roof since that could reduce the available space for the can.

The following link has more information - tips on getting a rough upper bound on the number of cans, placement (assuming that the earlier mentioned constraints are met), ...
LED recessed guide