The Extech Instruments LT300 has been a lifesaver for my work in industrial and scientific settings. My analysis of this product showed that it gives consistent and accurate readings, and THE NIST certification adds an extra layer of trust in its measurements. The device is also very user-friendly with its large display and easy-to-use buttons.However the only downside I've found is its relatively short battery life. Overall, the Extech Instruments LT300 is a reliable and convenient light meter that I would highly recommend to anyone in need of precise light measurements..