10 Best Photographic Light Meters 2025 in the United States

The Extech LT40 LED Light Meter is a digital light meter that offers several advantages for users needing to measure light levels accurately, particularly in photographic settings. One notable feature is its USB interface, which simplifies setup and data transfer, making it user-friendly for those who need to log and analyze their readings consistently. The selectable data sampling rates, ranging from 1 second to 24 hours, provide flexibility for various measurement needs, whether you require quick snapshots or long-term monitoring of light levels.

The LCD display is clear and informative, showing current readings as well as min/max and alarm status, which can be very useful in dynamic lighting conditions. This meter includes compatible analysis software for Windows, which can still be beneficial for data analysis if you have access to these operating systems. The LT40 is portable and lightweight, with dimensions of 5.3 x 1.9 x 0.2 inches and a weight of 4.94 ounces, making it easy to carry around during shoots or other activities.

High accuracy is a key strength, ensuring reliable measurements. However, the reliance on AAA batteries, though they are included, means you need to ensure you have spare batteries on hand. Additionally, the device's outer material is plastic, which might not be as durable as other materials. Despite these minor drawbacks, the Extech LT40 LED Light Meter is a solid choice for photographers and other professionals who need precise light measurements and value portability and ease of use.

The Extech SDL470 UVA/UVC Light Meter Datalogger is a digital light meter designed to measure a wide range of light intensities up to 10,000 Foot-candles or 100,000 Lux. This makes it suitable for various lighting conditions in photography. A notable feature is its adjustable data sampling rate, which allows users to customize how often measurements are taken. Additionally, it can store up to 99 readings manually and an impressive 20 million readings via a 2G SD card in Excel format, making data management straightforward and efficient for extensive logging needs.

The large backlit LCD display is clear and user-friendly, enhancing readability even in low-light environments. The product also includes useful functions like MIN, MAX, Data Hold, and Auto Power Off, which are helpful for capturing and retaining important measurements over time. Weighing 16.2 ounces and with dimensions of 3.2 x 2 x 7.4 inches, this light meter is relatively portable, although some users might consider it slightly bulky for on-the-go use. The inclusion of a tilt stand, sensors, case, and necessary batteries adds to its convenience.

However, it lacks specific flash metering capabilities, which might be a drawback for photographers who frequently work with flash lighting. The device is battery-powered and includes 6 AA batteries, which is convenient but may require frequent replacements depending on usage. The Extech SDL470 is a robust and versatile tool, particularly suited for users needing extensive light measurement and data logging capabilities in a variety of settings, though it may not be ideal for all photographers due to its size and lack of flash metering.

The Extech SDL400 Light Meter SD Logger is a digital light meter designed for those needing precise and versatile light measurement capabilities. One of its major strengths is its wide measuring range, capable of handling up to 10,000Fc or 100kLux, making it suitable for various lighting conditions. The precision silicon photo diode and spectral response filter ensure accurate measurements, and the device is designed to correct for cosine and color, which can improve the reliability of readings in diverse environments.

The SDL400 also includes a datalogger feature that logs and timestamps readings on an SD card in Excel format, making it easy to transfer and analyze data on a PC. This is particularly beneficial for users who need to keep detailed records over time or perform in-depth analysis later on. Additionally, the offset adjustment feature allows zero function calibration for relative measurements, enhancing its functionality for precise tasks.

The device requires 6 AA batteries, which are included, but the reliance on batteries means users need to be prepared with spares, especially during extended use. The size (7.2 x 2.9 x 1.9 inches) and weight (1.01 pounds) are reasonable for portability, but some might find it less compact compared to smaller models. This product is particularly useful for professionals in fields like photography, cinematography, and industrial lighting, where precise light measurement and data logging are crucial.