I recently purchased a light measurement kit from the Measure & Inspect category in Industrial and Scientific .Based on my experience, the EXact 486202 K Spa Photometer Starter Kit is an excellent product. The photometer is very user-friendly and the results ARE highly accurate. It offers a wide range of applications and the kit includes all the necessary accessories. However the price is a little high compared to similar products in the market. Overall, I am satisfied with my purchase and would recommend it to others in need of a reliable light measurement tool..