I have 2 x 250 wt MH and 4 x 110 wt vho Atinic and my rics are placed mid level in the tank. I haven't had any problems yet ( knock on live rock ) and they seem to be growing well.
I can't say I have ever fed my Rics so I don't know if it makes a difference or not. The book I have says they like "moderate illumination and "may" be fed plankton or newly hatched Artemia" but they obtain much of their energy from zooxanthllae.
HTH
