Digital photometer: high-precision probe: digital photodiode, filter lens, 120 degree incidence angle | Compact light meter: 200000 lux measurement range: the maximum measurement range is 200000 lux, meeting the different needs of different users | Lumen meter: suitable for lighting control in homes, , office buildings, production lies, aquaculture, plantations, stadiums, stage, and etc | Lux meter: data storage: 50 sets of test data can be recorded, the recording time can be adjusted from 1 to 60 seconds, and it has the function of delayed recording and measurement | Digital measuring tool: back bracket design: there is a support bracket on the back, and the maximum opening angle is about 90 degree