I don't know if this is any help, and these are not waterproof but if you have a condensation plate they'll be fine.
I've just received a set of these
http
/www.ebay.co.uk/itm/320824456819
All you need is the plug ( no wiring needed))
http
/www.ebay.co.uk/itm/AC-100V-240V-Adapter-DC-12V-2A-Power-Supply-extention-/160548401415?pt=UK_Pet_Supplies_Fish&hash=item25616e3107
Now 60 LEDs are more than adequate to provide moonlighting ( though not what I wanted them for) for my 4ft by 18" by 18". I've ran the strip along right at the back and will probably run the LED's at about half brightness.
You can cut the LED strips to the length you want, again literally cut, nothing electrical or anything you just cut them where it says you can. You could even go for a 30LED/m set for cheaper.
The good thing is this way you can dim the light to how you want it, you can also play about you the colour a bit, either using one of the pre-set blues or mixing you're own to get the shade you want.
The controller you receive can actually run two strips, which means if you want you can add another strip (£7) without any soldering etc. I doubt you will need more than one strip though.
As for ebay sellers, they will often be based in China, but if the item location is in the UK and they have decent UK feedback they will have a UK warehouse.