DLI-500: PAR, Daily Light Integral, and Photoperiod Meter (Full-Spectrum, 400-700 nm)

DLI-500 FULL-SPECTRUM METER - New for 2022, the Apogee Instruments' DLI-500 is an elegant, simple-to-use device for spot checking photosynthetically active radiation (PAR; 400-700 nm) levels and measuring daily light integral (DLI) and photoperiod under all light sources. DLI refers to the total amount of PAR or extended PAR (ePAR) incident on a plane in a 24-hour period, expressed in units of moles per square meter per day (mol m-2 d-1). Photoperiod is the total amount of time in which PAR or ePAR is incident on a plane during a 24-hour period and is expressed in units of hours (h). PAR, DLI, and photoperiod influence plant growth and development, and they are often measured in greenhouses and growth chambers to aid in light management and decision making. The DLI-500 is accurate under all light sources, but if you are looking for a low-cost option accurate under sunlight and some broadband light sources only, see our DLI-400 model. APOGEE QUALITY - Our products are developed for use