Extech LED Light Meters

The Extech LED light meter is used for monitoring and optimizing environmental light levels.


  • Measures LED and Standard Lighting in Lux or Foot-Candle (Fc) units
  • Cosine and color corrected measurements
  • Conforms to JIS C 1609:1993 and CNS 5119 general class A Specifications
Starting At $125.99
Stock Check Availability  

The Extech LED light meter is an affordable solution to monitor and optimize environmental light levels in buidlings, schools, and offices. Model LT40 measures white LED lights, while model LT45 measures white, red, yellow, green, blue, and purple LED lights. Additionally, model LT45 manually stores/recalls up to 99 readings. Measurements are calculated in Lux or foot-candles.

  • Foot-candle (Fc) Range: 40, 400 4000, 40000
  • Lux Range: 400, 4000, 40000, 400000
  • LED Type: white (LT40)/ white, red, yelow, green, blue, purple (LT45)
  • Basic Accuracy: ±3%
  • Dimensions: 5.2x1.9x1" (133x48x23mm)
  • Weight: 8.80z (250g)



  • (1) Meter
  • (1) Sensor with protective cover
  • (2) AAA batteries
  • (1) Pouch



  • (1) Meter
  • (1) Sensor with protective cover
  • (1) Coiled cable
  • (1) 9V battery
  • (1) Hard case
Questions & Answers
No Questions
Did you find what you were looking for?

Select Options

  Products 0 Item Selected
Part #
Extech LED Light Meters
LED light meter
Your Price $125.99
Check Availability  
Extech LED Light Meters
Color LED light meter
Check Availability  
Notice: At least 1 product is not available to purchase online
Multiple Products

have been added to your cart

There are items in your cart.

Cart Subtotal: $xxx.xx

Go to Checkout

In The News

Onset HOBO RX3000 Remote Soil Monitoring Station

The Onset HOBO RX3000 Remote Monitoring Station is an environmental monitoring system that continuously logs data from compatible sensors that measure soil moisture, water level, temperature and various weather parameters. With numerous options for remote monitoring systems, Onset provides a Build-a-system configurator to help with ordering a system fit for any project’s needs. The configurator easily guides the user through the process of selecting different types of communication, power, sensor and other site-specific requirement selections when building their ideal system.  The RX3000 ships with mounting plates and hardware, rubber cable channels, rubber plugs, grease, grounding wire and U-bolts.

Read More

Lake Malawi: A Treasure to Protect

Lake Malawi (also known as Lake Nyasa and Lake Niassa) doubles as a Rift Valley Lake and one of the seven African Great Lakes. Due to its unique biodiversity, it’s a great place to conduct limnological studies. Harvey Bootsma is a professor for the School of Freshwater Sciences at the University of Wisconsin-Milwaukee and has had an interest in limnology ever since he was a kid. Bootsma fondly recalls summer vacations to Georgian Bay, Ontario, “I probably spent as much time in the water as I did out of it.” He continues, "I remember telling myself, ‘I’m going to get a job where I can stay here all the time.’” While Harvey didn’t end up working on Georgian Bay, he was offered a job working on Lake Malawi. He continued working there while completing his Ph.D.

Read More

Microbes and Human Health: Aquatic Microbial Communities May Hold Clues about How Deadly Pathogens Spread

Aquatic ecosystems are incredibly complex, with many different biotic and abiotic factors constantly interacting. Microbial communities are a key part of aquatic ecosystems, involved in the constant flow of energy and recycling of organic matter, according to Science Direct .  The true scope of microbial community impacts on aquatic ecosystems is still not entirely understood. Eric Benbow, a professor of community ecology at Michigan State University, is exploring how microbial communities and pathogens may be negatively impacting human health, and how a changing climate could worsen this problem.  How Do Pathogens Arise? Benbow, along with his students and colleagues, are studying a realm of community ecology that is still relatively unknown.

Read More