T5HO light Odyssea Dual Pro 2 x 39w bulbs, on 12 hours a day, plus run CO2 more than 10 bpms.
I have my tank set up like this and it is overrun with all kinds of moss.
here's a messy pic of it. 1st pic is with flash, 2nd one without it.
I have only been running it for 4 months and my fissidens is approx 8 x 5 in size.