Why do I need a PAR/Quantum Meter? скачать в хорошем качестве

Why do I need a PAR/Quantum Meter?

Dr. Bruce Bugbee, of Apogee Instruments, explains the difference between measuring light for plants and light for humans and the instruments used to measure them. The video compares photosynthetically active radiation (PAR)/ quantum meters are used to measure light for plants to a footcandle meter used to measure light for humans. VIDEO CONTENT Humans and plants perceive light differently, therefore, different instruments must be used to measure how each see light. 01:14 We begin by looking at light between 400 and 700 nm. Photosynthetically active radiation (PAR) is the light from 400 and 700 nm that is used in photosynthesis. It is not a measurement or metric, it defines a type of light. 01:59 Explanation of how humans see light, showing the colors that people see more intensely such as green. Light for humans is measured in lumens using a lux or footcandle meter. 02:40 Explanation of how plants see light. Plants see all colors of light equally this is called the defined or ideal quantum response. Light for plants is also the same light for any photosynthetic organism including coral in an aquarium. Light for plants is measured in PPFD using a PAR or quantum meter. DEMONSTRATION QUANTUM METER VS FOOTCANDLE METER 03:40 Apogee MQ-500 Full-spectrum Quantum Meter vs. Footcandle Meter 07:42 Cool White PPFD: 200 Footcandles: 1278 Ratio: 6.4 x Neutral White PPFD: 200 Footcandles: 1577 Ratio: 7.9 x Warm White PPFD: 200 Footcandles: 1386 Ratio: 6.9 x LEDs PPFD: 200 Footcandles: 620 Ratio: 3.1 x CONCLUSION 09:07 Although footcandle and lux meters are less expensive, they do not accurately measure light for plants and lead to significant errors. To measure light from the sun, grow lights, aquarium lights, etc. for plants, corals, and other photosynthetic organisms a quantum meter needs to be used. More information at http://www.apogeeinstruments.com/quan.... More videos on quantum sensors can be found at    • PAR-Photosynthetically Active Radiation-Qu...  . Follow us to see all the cool places our sensors are used, get notices for free classes and how to videos, and product announcements! -Facebook   / apogeeinstruments   -Twitter   / apogeeinst   -LinkedIn   / 1084851   -Instagram   / apogee_instruments   ------ BUY THE MQ-500 http://www.apogeeinstruments.com/mq-5...