Thanks for info/advice Joeystank...I'm now having doubts about where I've located the tank, but really don't have any other viable location - not without majorly changing the house layout. The window/door where it's located is thankfully not subject to direct sunlight and also some thick curtains that normally hang on the side (out of photo shot) of the window near the tank.
Have emailed Red Sea about the bulb, hopefully all gets sorted.
Aearin, everything is all bought mate and I totally get where you're coming from. On top of the £850 for the tank, I've done £200 in live rock plus the live reef sand, testing kits, refractometer, water jugs, reef mature kit, Tunze ATO etc etc. Jeez, I'm touching £1500 nearly...and getting close to having to give in and let the missus get a Pug! lol
I'm taking nanoreefing4fun's advice and running the stock carbon during the cycling process and will then switch out for Purigen and CPE. From what I'm hearing on the ATO, it's the way to go for sure.