As someone who works in the Industrial and Scientific field I highly recommend the Industrial Test Systems photometer for light measurement. Thanks to my knowledge gained in practice, this photometer is the most accurate and efficient one I have used thus far. The readings are consistently precise and the device is simple to use. Its compact size is also a plus for convenient portability .The only con is that it could have more features, but for its intended use, it is more than adequate. Overall, a great investment for anyone in need of accurate light measurement..