The Extech LT45 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 it is less expensive, more energy efficient, and brighter. The LT-45 is able to measure both white or color LED lights once the light type is selected, plus it stores/recalls up to 99 records. Both meters also measure Standard Lighting (Fc/Lux).