The Adjustable AquaBeam has been redesigned to use drop-in MR16 lamps in extremely wet or underwater applications. This new construction allows you to specify the wattage, beam spread, and color for your lighting design and is field serviceable. The Adjustable AquaBeam is precision machined from C464 Naval Brass and offers vertical and horizontal adjustment. It works best with premium Brilliance MR16 4W, 5W, or 7W lamps. Dimmable with Brilliance Dimmer and most magnetic transformers.