The Extech LT40 LED Light Meter is used for monitoring and optimizing environmental light levels in buildings, schools, and offices. LED lighting is being used more commonly, because they are less expensive, more energy efficient and brighter. The Model LT40 measures the light intensity for white LED lights.

The Extech LT40 ships complete with: Built-in sensor, Protective cover, 2 AAA batteries, Pouch.