My tank is 8" deep. I don't know if you can put 4 strips on that arm, ask Martin if you can or if three is the max. I would definatley do the 3 for sure though. I don't find it overly bright where i have to dim it down at all.
Its really nice in the evening when the outside and room get darker then it shows its real colors.
The strips I have are all the same with the white and blue combo. You can do it other ways too but I like this look nice crisp and clean.
Let me know what you decide to do.
Cheers
