作为ARRI M系列的一员，M40这套无透镜系统整合了菲涅耳和筒灯的长处。无透镜的设计增加了亮度：在点光模式下比AS40亮30%左右。由于其采用了独特的专利MAX技术反光碗，它的对焦范围为18 到 52°半峰值角。M40可以带来非常均匀的光线分布，并在全焦段范围内投射出清晰的阴影。反光碗针对4000W灯泡优化，但同样可以用于2500W的灯泡。
灯头装备了线缆损耗补偿（CCL）模块。在与ARRI EB 2.5/4 kW 高速自动扫描CCL镇流器搭配使用时，即便在使用较长线缆的时候，灯泡也可以获得全部额定功率。这意味着光强输出与线缆长度再无关联。

As a member of arri M series, M40 lens less system integrates the advantages of Fresnel and downlight. The lensless design increases the brightness: about 30% brighter than AS40 in spot light mode. Due to its unique patented Max technology reflective bowl, its focus range is 18 to 52 ° half peak angle. M40 can bring very uniform light distribution and cast clear shadows in the full focal range. The reflective bowl is optimized for 4000W bulbs, but can also be used for 2500W bulbs.
The lamp cap is equipped with cable loss compensation (CCL) module. When used with arri EB 2.5/4 kW high-speed automatic scanning CCL ballast, the bulb can obtain full rated power even when using a long cable. This means that the light intensity output is no longer related to the cable length.