Allan,

Regarding the fixture, I looked cost, flexibility and long term. Tracking lighting is ok on cost, great for flexibility but I believe bad on long term as the contacts and power strip is exposed to the elements. Since looks are not an issue, I went with a 20" wide wire storage shelf and weatherproof lamp holders that hook to the shelf allowing easy positioning.

txg8gxp

Your correct regarding the spotlight look and the area it covers but that is why I went with the 60* optics that will give you a little less spot and more blend. I used the 12x12 to determine the amount of lamps I needed + additional for safety and moonlight. My tank is 7x2x2 so 14sqft, therefore 14 bulbs but I dont have to lit the inside of my overflows so its actually 13 + 3 @ 80* for moonlight.