Extech LT300 Light Meter (Discontinued)

Wide range to 20,000Fc or 200,000 Lux with high resolution to 0.01 Fc/Lux

The Extech LT300 Light Meter has been discontinued. For a similar product, please visit the Industrial Equipment Tools page.

The Extech LT300 Light Meter is a light meter that delivers digital and analog displays of light in Foot-candles or Lux.

Get precise measurements of light every time with Extech.


  • Wide range to 20,000Fc or 200,000 Lux with high resolution to 0.01 Fc/Lux
  • Relative mode indicates change in light levels, peak mode captures highest reading
  • Remote light sensor on 12" (305mm) coiled cable - expandable to 24"
  • Utilizes precision photo diode and color correction filter
  • Large LCD display with analog bargraph
  • Backlight for readings in low light levels
  • Complete with 9V battery, light sensor with protective cover, protective holster, and pouch case


Display Multi-function 3-3/4 (3999) digit LCD with Bargraph indicator
Over range indication LCD displays 'OL'
Spectral response CIE photopic (CIE human eye response curve)
Measurement repeatability ±2%
Temperature coefficient ±0.1% per °C
Sampling rate 13.3 times per second (bargraph); 1.3 times per second (digital display)
Photo detector Silicon photo-diode with spectral response filter
Peak hold Capture light peaks to 10µS
Operating conditions Temperature: 32 to 104°F (0 to 40°C); Humidity: < 80% RH
Storage conditions Temperature: 14 to 140°F (-10 to 50°C); Humidity: < 80% RH
Dimensions 6.5 x 3.0 x 1.7" (165 x 76 x 43mm)
Weight Approx. 14.2 oz. (403g) with battery installed
Power supply 9V battery

Test Options Set


1 Review Hide Reviews Show Reviews

  • 5
    Very useful

    Posted by Len T Raley on Nov 28th 2012

    Simple and easy to use, very satisfied user.

This product comes standard with a 1-year warranty.

Return Information

  • Return windows close 30 days after you receive your item.
  • You are responsible for obtaining a Return Merchandise Authorization, the cost of shipping, and potential restocking fees, if the item has been opened.
  • To start a return, or to view the full returns policy, click here.
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