Coralife Aqualight Pro

[Griffin]

Sorry - i can't tell you about spillage of light as i mounted mine inside a canopy after cutting out air flow holes to match the ones on the unit. The 72" is 72"Lx15"Wx2.75"H - the only thing that changes on the dimensions is the length - width and height are the same on all. The legs can only be moved the length of the unit for positioning on your tank - no side to side or back and forth and i guess for access you would have to remove it or get the cable hangers that is also available. Sure you can't see mine in the canopy but it made life easy for mounting, access to tank and a plug and play unit is all i had time for - Hope this helps
Have a Great New Year all

Cheers
Rich