The Spectral Evolution ILM-660 is a unique blend between a light source and a probe making it an ideal lab accessory. At 40 watts, this high-intensity light source is perfect for gathering data from very dark samples that benefit from the use of the brightest light. The ILM-660 comes with a removable sapphire window so you can put your sample directly onto the light source. It also comes with a glass petri dish so you can easily and accurately measure loose samples like powder or soil. A quick-release fiber mount allows you to take full advantage of the two 20-watt tungsten-halogen bulbs housed within.