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Extech LT45: Color LED Light Meter

Measure the Illuminance of White and Color LED Lights

The LT45 LED light meter is useful for measuring and optimizing environmental light levels in a wide range of environments, including office buildings, manufacturing plants and warehouses, university campuses, schools, hospitals, and many other locations. OSHA regulates workplace lighting because illumination must be adequate for assigned tasks, and light meters are used to verify regulatory compliance, as well as state and local public safety codes and ordinances. Use of LED lighting is on the rise because it is more efficient to operate, it emits stable, high quality illumination, and the technology is dropping in price. The LT45 comes with a 9-volt battery, protective sensor cover, hard case, and user manual.



  • Measure White, Red, Yellow, Green, and Blue LED and Standard Lighting in Lux or Foot-Candle (Fc) units
  • Manually store/recall up to 99 readings
  • 4000 count LCD display
  • Cosine and color corrected measurements
  • Min/Max Average and Auto Power Off
  • Complete with light sensor with protective cover and coiled cable expandable to 59″ (1.5m), 9V battery, and hard carrying case


Specifications Range
Foot-candle (Fc) 40, 400 4000, 40000
Lux 400, 4000, 40000, 400000
LED Type white, red, yellow, green, blue
Basic Accuracy ±3%
Dimensions 5.1×2.2×1.5″ (130x55x38mm)
Weight 8.8oz (250g)


LT45 English Datasheet

LT45 English User’s Manual

LT45 CE Declaration of Conformity