I would tend to agree with 3 of the points above
1) Get a timer, it could take a month but they will get used to the schedule
2) Set the timer to turn on after dawn and turn off before sunset. So the light is not what is actually waking them up.
3) Get cover it make the fish come out more, Floating plants, submerged plants, moss, driftwood, caves, ornaments etc...
I use just LEDS and doubt that it is too bright, but if you think that it is infact too bright I would simply buy, a floating plant which would naturally dim the light (frogbit , Lillies, duckweed, etc..). But I doubt it is too bright.
I would add one more point.
Feed them on a schedule in an open part of the tank. This will take a while but they will learn this too and it will help get them used to coming out when you are around.