Lighting options

[ensquire]

how do most of these fixtures get mounted?? Side by side or length ways? My tank is only 18" wide and I feel that If I mounted 2 fixtures length ways it would be enough using the Radions as long as they were a foot off the tank. I feel I would need 3 if I went side by side and would probably not need to be quite that distance up. now price wise that would be significant , I personaly like the radions better, but I'm not sure if they are that much better. having a hard time justifying the extra expense. If 2 lengthways works its 1700.00 compared to 1000.00 with controller and rails.. If it's 3 side by side that makes it about 2500.00 compared to 1300.00..
But if it's 2 radions lengthways vs 3 AI side by side it brings things closer..
Are the Radions that much better??