The 400w HMI focusing light head by dedolight is a pure pleasure to use. Like all its relatives, double aspheric lensing creates the cleanest and most controllable beam in its class. Most are not used to the range this popular lamp size can achieve without additional accessories. This light has a native flood to spot range of 50°- 4.5°, and a focal intensity ratio of 1:20. This is a native function of the light by simply turning the focusing knob. Add up all the time it takes to put single angle par can attachments to your tradition 400w HMI and pay it back to yourself! Most don't know that this light can also be operated with a tungsten ceramic HMI lamp as well which has four times the output of traditional tungsten lamps. Using either lamp, the light can be switched at the flicker-free DEB400DT electronic ballast from 400w to 575w, then dim 40% beyond. This light head has a army of optional attachment which don't require tools to add and only take a few seconds to apply. If you are used to using another projection system with another 400w HMI light, you MUST see this with it's DP400 projector before you ever buy another 400w HMI light system. This product page is only the light head so please see required accessories below for full operation.