--- product_id: 4985811 title: "Extech LT40 LED Light Meter" brand: "extech" price: "RM876" currency: MYR in_stock: true reviews_count: 13 category: "Extech" url: https://www.desertcart.com.my/products/4985811-extech-lt40-led-light-meter store_origin: MY region: Malaysia --- # 4000 count backlit LCD 1.2" jaw fits up to 500MCM conductors Auto power off for battery saving Extech LT40 LED Light Meter **Brand:** extech **Price:** RM876 **Availability:** ✅ In Stock ## Summary > 💡 Light up your workflow with precision and ease! ## Quick Answers - **What is this?** Extech LT40 LED Light Meter by extech - **How much does it cost?** RM876 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/4985811-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 - • **Versatile & Compact:** Lightweight 5.3" design fits comfortably in any toolkit - • **Smart Power Management:** Auto power off extends battery life for uninterrupted use - • **Tangle-Free Efficiency:** Integrated sensor eliminates cords for one-handed operation - • **Instant Voltage Detection:** Non-contact voltage detector enhances jobsite safety - • **Precision in Every Measurement:** Accurate lux & foot-candle readings with LED-compatible sensor ## Overview The Extech LT40 LED Light Meter delivers precise lux and foot-candle measurements with a built-in LED-compatible sensor, featuring a 4000 count backlit LCD for clear readings. Its compact, lightweight design includes a 1.2" jaw for conductors up to 500MCM and an integrated non-contact voltage detector, all powered efficiently by auto power off and included AAA batteries—perfect for professionals seeking reliable, tangle-free light measurement on the go. ## Description Extech Basic Accuracy 40-40,000 FC LED Light Meter. Review: Great meter. Get the one with separated sensor - Great meter. Seems super accurate, and quality. The cap that covers the light sensor always reads 0 and calibrates every time you turn it on. I use it for testing light intensity from my grow lights in a grow tent. I found it would have been much easier to read the lcd screen if the sensor was separated from the main module/screen. My grow plants are very close to the grow light so I end up barely being able to view the screen and the light is blinding that close so it’s hard to even read the screen if I can view it. A separated sensor just gives you more options for reading, but I understand it would be less portable. Review: I would buy it again. - The Extech LT40 LED Light Meter is easy to use and appears to provide reasonable measurements. I say reasonable as i have no good method to determine the true accuracy of the meter, and the readings i get appear within a window of what i would expect for common light sources. I typically use it for readings of 10 foot-candles and below, usually in the 0.3 to 3.0 range, and with LED lighting, induction lighting, and metal halide lights. I performed a couple of measurements in an office environment and compared the readings to a lighting print of the area, and my readings were in the general area of what one would expect for the office area, and compared favorably with architectural lighting prints. The only drawback so far for me is the display is not backlit, so using it in the darker environment I am typically in can present a challenge at times, however, worst case I use the Hold feature and then read the display. Also, since the detector is fixed to the meter and not even rotatable, at times taking readings requires using the Hold feature if the meter needs to be facing away from me. For the money and the ease of use, I would buy this again. ## Features - Data hold and auto power off - Relative mode for capacitance zero and offset adjustment - 4000 count backlit LCD display - 1.2" jaw size for conductors up to 500MCM - Integrated non-contact voltage detector ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00FF3X34M | | Batteries | 2 AAA batteries required. (included) | | Best Sellers Rank | #45,976 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #15 in Lab Photometers & Light Meters | | Date First Available | September 6, 2013 | | Is Discontinued By Manufacturer | No | | Item Weight | 4.9 ounces | | Item model number | LT40 | | Manufacturer | Extech | | Product Dimensions | 5.3 x 1.9 x 0.2 inches | ## Product Details - **Age Range (Description):** Adult - **Brand:** Extech - **Color:** White - **Connectivity Technology:** Usb - **Display Type:** Digital - **Included Components:** Extech LT40 LED Light Meter - **Outer Material:** Plastic - **Product Care Instructions:** Wipe Clean - **Special Feature:** High Accuracy - **Specification Met:** CE ## Images ![Extech LT40 LED Light Meter - Image 1](https://m.media-amazon.com/images/I/81stFVFgFmL.jpg) ## Available Options This product comes in different **Style** options. ## 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 ### ⭐⭐⭐⭐⭐ Great meter. Get the one with separated sensor *by K***. on November 29, 2021* Great meter. Seems super accurate, and quality. The cap that covers the light sensor always reads 0 and calibrates every time you turn it on. I use it for testing light intensity from my grow lights in a grow tent. I found it would have been much easier to read the lcd screen if the sensor was separated from the main module/screen. My grow plants are very close to the grow light so I end up barely being able to view the screen and the light is blinding that close so it’s hard to even read the screen if I can view it. A separated sensor just gives you more options for reading, but I understand it would be less portable. ### ⭐⭐⭐⭐⭐ I would buy it again. *by D***K on December 22, 2014* The Extech LT40 LED Light Meter is easy to use and appears to provide reasonable measurements. I say reasonable as i have no good method to determine the true accuracy of the meter, and the readings i get appear within a window of what i would expect for common light sources. I typically use it for readings of 10 foot-candles and below, usually in the 0.3 to 3.0 range, and with LED lighting, induction lighting, and metal halide lights. I performed a couple of measurements in an office environment and compared the readings to a lighting print of the area, and my readings were in the general area of what one would expect for the office area, and compared favorably with architectural lighting prints. The only drawback so far for me is the display is not backlit, so using it in the darker environment I am typically in can present a challenge at times, however, worst case I use the Hold feature and then read the display. Also, since the detector is fixed to the meter and not even rotatable, at times taking readings requires using the Hold feature if the meter needs to be facing away from me. For the money and the ease of use, I would buy this again. ### ⭐⭐⭐⭐ Good light meter, but not accurate at very low levels of light *by K***T on October 30, 2020* Easy to use, and appears accurate at normal light levels; once under 0.5 foot candles, however, does not appear to be accurate (what should have read as 0.1 to 0.2 foot candles was reading as a 0) ## 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.com.my/products/4985811-extech-lt40-led-light-meter](https://www.desertcart.com.my/products/4985811-extech-lt40-led-light-meter) --- *Product available on Desertcart Malaysia* *Store origin: MY* *Last updated: 2026-04-23*