60 degree can work.
A wide beam pattern is ideal due to how close they are to the substrate to give a good coverage but if printing in high resolution and single direction printing there shouldn't be a problem as long as they emmit the correct light spectrum.
Hi...i have a setup of OR Blue Sky. The OR Blue Sky version contained 24 dual-chip LEDs combining Blue & Cyan. The new OR2 Blue Plus spectrum utilises 24 dual-chip LEDs but uses 8 different colour variants ranging from 410nm to 495nm.