Just a wee update on this.
The fish, for some odd reason took a real dislike to the lights in the aquarium and would hide all day, so much so that trying to get them used to it again resulted in them developing fin rot anyway, a friend bought a 2nd hand tank about a month ago that came with 3 x 4ft rgb(color changing) led strip lights with remote control and he gave them to me as he was using the tank for terrapins so no need for the strips.
I got the fin rot under control and started getting them used to the leds. I had set a custom color to a white'ish yellow as dull as I could get it and instantly the fish took to them like a fish to water
when they went on for the first time it was a bit 'wtf is this, lets hide' but it only took a few minutes for them to come out of hiding and started swimming around like nothing had happened. I now have much happier fish.
I cant get a good picture to show the lighting but its sort of similar to Steves setup here except a little bit dimmer.
This is the other tank I put one on: