I think a lot will depend on the lighting the coral came from. If the coral came from weak lighting (such as standard flourescent like what Petco uses) it may take time to adapt. That said, few people I know run LEDs at 100%. I believe many max out around 60% or so, so the 35% isn’t that bad. It may just be what your coral like and a slow ramp up to higher numbers is needed. Like 1% increase every couple weeks judging how the coral look.