ARRI‘s M18 HMI Lamphead is a newly designed, more efficient lamp head built to work with a new power class of lamp which has a luminous efficacy of 92 lumens/watt, and a Color Rendering Index (CRI) greater than 90 at 6000K. The M18 is an open-face, lensless fixture that combines the characteristics of a PAR and a Fresnel, creating diverging rays of light to produce a very crisp shadow. It can operate on a 20A circuit. This lamp has a beam angle (HPA) of 20 to 60° with a wide usable field angle.

The ARRI 1200/1800W High Speed Electronic Ballast is a flicker-free power supply for 1,200 or 1,800W tungsten lamp heads. Compatible heads include the AS18, M18, Compact 1200, AS12, ARRI X 12 and D12.