Lighting is 2 x 54w Juwel t5 (1x MARINE WHITE & 1x daylight) plus 1x 42" Actinic & 1x42" sun glo. The bulbs will be changed once the tank has been running a year, though im toying with the idea of upgrading to MH lighting. In honesty, the corals are doing so well i'm really not sure about upgrading - the large Colt Coral to the far left has had several 3-4" cuttings taken from it in the last 3 months or so and it's still growing like a weed. It's a similar story with the large Lobophytum (in the centre on the sand) and the Capnella above it. The tank has been set up for around 9 months now.