Unlike a conventional aquarium hood, the Overtank Luminaire is raised clear from the top of the tank on legs, which attach securely onto the glass side walls. This range has an oval body profile, which tilts back on a rocking mechanism. It has 2 x T8 lamps & the width from front to back is 230mm. The undersurface of the unit is completely water-tight with access to the lamps by removing the upper panel. The open top allows plant growth beyond the water surface. Supplied with 2x 15w lamps. Because of the variations in all the different models please allow up to ten days for delivery.