Hey Warr,
To start with i marked both centres of my perspex lids. I then chose some draw handles from bunnings. Then from there worked out what light fixtures i would need a simple party globe on the left side. I also have a blacklight in tank and a simple fluro. The blacklight and fluro were the same size so it was not to hard for an ex boillermaker to mark out the lid. From then i also drilled a heap of air holes in the lids for some heat to escape making sure the holes were all in line. My brother is an electrician so he wired the lights up to give me power. The blacklight stays on for a liitle longer at night and the tank looks amazing at night. There is also three constant waterfalls on the fake background , which in turn is being constantly filtered. If i missed anything, please just ask again.