--- product_id: 225196583 title: "LT40 LED Light Meter" brand: "extech" price: "€ 292.24" currency: EUR in_stock: true reviews_count: 5 category: "Extech" url: https://www.desertcart.fi/products/225196583-lt40-led-light-meter store_origin: FI region: Finland --- # 400,000 lux max range 4000 count LCD display built-in sensor with protective cover LT40 LED Light Meter **Brand:** extech **Price:** € 292.24 **Availability:** βœ… In Stock ## Summary > πŸ’‘ Illuminate your workspace with precision and confidence! ## Quick Answers - **What is this?** LT40 LED Light Meter by extech - **How much does it cost?** € 292.24 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/225196583-lt40-led-light-meter) ## Best For - extech enthusiasts ## Why This Product - Trusted extech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Smart Power Management:** Auto power-off feature conserves battery life, keeping your meter ready when you need it most. - β€’ **Ultra-Responsive Display:** 4000 count LCD ensures crystal-clear readings with Β±3% accuracy, empowering confident decisions every time. - β€’ **Durable Sensor Protection:** Built-in sensor shielded by a protective cover guarantees longevity and reliable performance in any setting. - β€’ **OSHA-Compliant Measurements:** Ensures workplace lighting meets regulatory standards, safeguarding productivity and safety across professional environments. - β€’ **Precision Lighting Insights:** Accurately measures white LED and standard lighting in lux or foot-candle units for flawless environmental optimization. ## Overview The Extech LT40 LED Light Meter is a compact, high-accuracy device designed to measure both white LED and standard lighting sources up to 400,000 lux. Featuring a 4000 count LCD display, built-in sensor with protective cover, and user-friendly functions like min/max averaging and auto power-off, it’s ideal for professionals ensuring OSHA-compliant lighting in offices, schools, hospitals, and industrial settings. ## Description Extech LT40 LED Light Meter, 4000 Count LCD Display, Built-in Sensor with Protective Cover, Measure White LED and Standard Lighting in Lux or Foot-Candle (Fc) Units, Min/Max Average and Auto Power OffThe LT40 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. Besides LED lighting, the LT40 can measure standard light sources fluorescent, metal halide, high pressure sodium and incandescent up to 400,000 lux (40,000 Fc). The LT40 comes with a built-in sensor with protective cover, 2 AAA batteries, storage pouch, and user manual.Key FeaturesMeasure white LED and Standard Lighting in Lux or Foot-Candle (Fc) unitsBuilt-in sensor with protective cover4000 count LCD displayCosine and color corrected measurementsMin/Max Average and Auto Power OffSpecificationsFoot-candle (Fc) Range: 99.99, 999.9, 9999, 40000Lux Range: 999.9, 9999, 99990, 400000LED Type: whiteBasic Accuracy: Β±3%Dimensions: 5.2"x1.9"x1" (133x48x23mm)Weight: 8.80z (250g) Review: Quality meter without the wires Review: This isn't junk..................... ## Features - Measures LED and Standard lighting - For White and Color LEDs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00FF3X34M | | Age Range (Description) | Adult | | Age Range Description | Adult | | Best Sellers Rank | #1,095,242 in Electronics ( See Top 100 in Electronics ) #106 in Light Meters | | Brand | Extech | | Brand Name | Extech | | Colour | Green | | Customer Reviews | 4.3 out of 5 stars 163 Reviews | | Display Type | LCD | | Global Trade Identification Number | 00793950470145 | | Indoor Outdoor Usage | Indoor | | Item Weight | 0.14 Kilograms | | Manufacturer | Extech Instruments | | Model Name | LT40 | | Model Number | LT40 | | Number of Batteries | 2 AAA batteries required. (included) | | Outer Material | Plastic | | Outer Material Type | Plastic | | Part Number | LT40 | | Power Source Type | Battery Powered | | Product Care Instructions | Wipe Clean | | Response Time | 1 Seconds | | Reusability | Rechargeable | | Special Feature | High Accuracy | | Special Features | High Accuracy | | Specification Met | OSHA | | UPC | 785533714388 793950470145 735090506124 | | Unit Count | 4E+3 Count | | Upper Temperature Rating | 36960 Degrees Celsius | ## Product Details - **Brand:** Extech - **Special Feature:** High Accuracy - **Colour:** Green - **Age Range (Description):** Adult - **Outer Material:** Plastic ## Images ![LT40 LED Light Meter - Image 1](https://m.media-amazon.com/images/I/81stFVFgFmL.jpg) ## Questions & Answers **Q: Does this item come with calibration certificate?** A: Hello Antonio - there isn't a calibration certificate. Based on the various tests I've done the results make sense and the machine is highly responsive. This isn't what I would regard as a precision instrument, but for my purposes g it worked fine. **Q: Does this product come with a warranty?** A: Hello, Thanks for your question, yes, the meter has a 2-year warranty, If you have any questions, please feel free to contact our tech support line at 866-477-3687 option 3 **Q: With the lt45 what light source setting should be used with fluorescent and sodium lights as the manual only lists incandescent and led's?...** A: Hi, thanks for your question, there are 10 light source selections (L0 – L9) each having a unique calibration correction factor (multiplier). See the Light Source list below. The multipliers for locations L0 through L6 are fixed for the lighting types listed. Locations L7 through L9 are extra locations that the user can customize (with a multiplier from 0.001 to 1.999). L0: Standard incandescent light source L1: LED white daylight L2: LED AMBER (YELLOW) light L3: LED GREEN light L4: LED RED light L5: LED BLUE light L6: Not used L7~L9: Programmable User Custom Locations (preset to 1.00) if you have any questions, feel free to contact our technical support line at 866-477-3687 option 3 **Q: Does this perform well in very bright conditions ( very sunny conditions) and in now light conditions?** A: I feel that the Extech LT40 LED does respond fairly well in very bright conditions. As I see it, the meter is designed to read environmental conditions, such as light coming into a building or space, or even on the exterior. If you need to read just the solar conditions (visible light) in an unobstructed open space or area there are better, but often higher priced, meters for that purpose. Nick M ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality meter without the wires *by D***R on 13 September 2015* ### ⭐⭐⭐⭐⭐ This isn't junk..................... *by A***. on 8 December 2022* ### ⭐⭐⭐⭐⭐ conforme *by C***N on 1 May 2023* Strumento di misura dedicato per luce emessa da sorgente a led, molto valido, risulta affidabile. ## Frequently Bought Together - Extech LT40 LED Light Meter - Extech LT300 Light Meter - Leica Geosystems DISTO D2 New 330ft Laser Distance Measure with Bluetooth 4.0, Black/Red, 1.7 x 1 x 4.6 inches --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fi/products/225196583-lt40-led-light-meter](https://www.desertcart.fi/products/225196583-lt40-led-light-meter) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-04-23*