Yea ur corals arnt going to do good with actinics ... they use more of the 10000 k lighting plus u won't be able to see the corals true color.. what lighting are u using?
The led's r good for that tank u should get the led's they're good but try to keep it natural.. plus its a good idea to get some moon lights ud probly like how they look in ur tank at night and plus fish should have some kind of small lighting such as moon lights at night because in the ocean they get moon light plus they can see what they're doing ...
Defenately, for a 3 gallon its plenty.. r u planning on getting it? And what kind of corals r u planning on adding in ur tank?
They should do fine because its only 3 gallons but its totally up to u... the moon light makes a big difference look wise... so u can somewhat see it at night plus moonlight looks awesome