Split Type Design: the separation of the measurement part and reading part with retractable spring can avoid the influence of strong light on the naked eye. Wide Measurement Range: 0-200000 lux and 0Fc ~ 20000Fc with switchable units of Lux / Fc and temperature units of / . Large illumination probe effectively increases the measurement area with better processing efficiency in higher or narrower measurement environment. 2 Recording Modes: automatic storage of illumination data (up to 2000 groups) and manual storage (up to 60 groups) MAX / MIN / Difference Value / Data Hold functions, high accuracy with automatic range and quick response. Large and clear LCD display with backlight for easy reading Low battery indication & auto power off energy saving Widely used for monitoring light intensity in homes laboratories office schools indoor farming etc.