--- product_id: 50494068 title: "Extech LT40 LED Light Meter" brand: "extech" price: "MX$8386" currency: MXN in_stock: false reviews_count: 6 category: "Extech" url: https://www.desertcart.mx/products/50494068-extech-lt40-led-light-meter store_origin: MX region: Mexico --- # 4000-count LCD clarity Dual Lux & Foot-Candle units Protective sensor cover Extech LT40 LED Light Meter **Brand:** extech **Price:** MX$8386 **Availability:** ❌ Out of Stock ## Summary > 💡 Illuminate your workspace with precision and style! ## Quick Answers - **What is this?** Extech LT40 LED Light Meter by extech - **How much does it cost?** MX$8386 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/50494068-extech-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 - • **Ready-to-Use Kit:** Includes integrated sensor with protective cap, batteries, carry case, and manual—everything you need to measure on the go. - • **Compact & Lightweight:** Slim 140g design fits perfectly in your toolkit or pocket for professional mobility. - • **Smart Power Management:** Auto power-off feature maximizes battery life for uninterrupted fieldwork. - • **Precision in Every Beam:** Cosine & color-corrected measurements ensure spot-on illuminance readings. - • **Versatile Lighting Metrics:** Switch effortlessly between Lux and Foot-Candle units to suit your project needs. ## Overview The Extech LT40 is a compact, battery-powered LED light meter designed for accurate measurement of white LED and standard lighting in both Lux and Foot-Candle units. Featuring a 4000-count LCD display, cosine and color-corrected sensor, and protective cover, it offers reliable, professional-grade illuminance readings with smart power-saving auto shutoff. Lightweight and portable, it comes complete with batteries, carry case, and user manual—ideal for managers and professionals demanding precision lighting data on the move. ## Description Product Description The Extech 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. As OSHA regulates workplace lighting, light meters such at the LT40 can verify regulatory compliance, as well as state and local public safety codes and ordinances. The LT40 can also measure standard light sources such as fluorescent, metal halide, high pressure sodium, and incandescent lighting, 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. Box Contains The LT40 comes with a built-in sensor with protective cover, two AAA batteries, storage pouch, and user manual. Review: Extech LT40 - Sturdy and reliable little light meter. Has become my reference light meter. Switches off automatically after 12 seconds but you can override this by pushing on the on/off button for 5 seconds. Automatic ranging very handy. Does not remember your preferences like in my case I am interested in the maximum value during a session so I have to remember to push the max button each time. Struggles in low light less than 5 lux due to the smallness of the sensor, so you cannot measure moon light. Review: The only lihgt meter with all that we we're looking for. We love the options and different light bulb settings that are programmed into this meter. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00FF3X34M | | Batteries | 2 AAA batteries required. (included) | | Country of origin | Taiwan | | Customer reviews | 4.4 4.4 out of 5 stars (195) | | Is discontinued by manufacturer | No | | Item model number | LT40 | | Label | Extech | | Manufacturer | Extech | | Product Dimensions | 13.46 x 4.83 x 0.51 cm; 140 g | ## Product Details - **Age range (description):** Adult - **Brand:** Extech - **Colour:** White/Opulent Garden - **Connectivity technology:** Usb - **Display type:** Digital - **Outer material:** Plastic - **Special feature:** LED screen - **Specification met:** CE ## Images ![Extech LT40 LED Light Meter - Image 1](https://m.media-amazon.com/images/I/81stFVFgFmL.jpg) ![Extech LT40 LED Light Meter - Image 2](https://m.media-amazon.com/images/I/51KbWzQxt2L.jpg) ![Extech LT40 LED Light Meter - Image 3](https://m.media-amazon.com/images/I/41IpEMxaHbL.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 ### ⭐⭐⭐⭐ Extech LT40 *by A***D on 17 June 2016* Sturdy and reliable little light meter. Has become my reference light meter. Switches off automatically after 12 seconds but you can override this by pushing on the on/off button for 5 seconds. Automatic ranging very handy. Does not remember your preferences like in my case I am interested in the maximum value during a session so I have to remember to push the max button each time. Struggles in low light less than 5 lux due to the smallness of the sensor, so you cannot measure moon light. ### ⭐⭐⭐⭐⭐ Review *by A***R on 19 November 2017* The only lihgt meter with all that we we're looking for. We love the options and different light bulb settings that are programmed into this meter. ### ⭐⭐⭐⭐⭐ Review *by D***R on 13 September 2015* For the price, works great. Purchased this for use in acquiring night light meter readings on roadways. It allows for lux or foot candle measurements. The instruction manual covers the quirky min/max average function. Otherwise, it did a great job on the jobsite. The included bag provides for good storage and the device is sturdy and works good in a commercial environment. The only issue is there is no back light, which made night readings a little difficult. The fact that the light meter was integrated into the device meant there was no additional wires to manage. ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.mx/products/50494068-extech-lt40-led-light-meter](https://www.desertcart.mx/products/50494068-extech-lt40-led-light-meter) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-05-08*