As an industrial and scientific professional we have found the Solarmeter Model 6.0 Standard Meter to be a lifesaver when it comes to light measurement .Based on our own experience, we can assure you that the accuracy of this device is unmatched. The compact design is an added advantage and makes it easy to carry around wherever you go. however, the price point might be a bit expensive compared to similar products in the market. Overall, we highly recommend this product..