Timestamps of topics covered:
2:24 Light as one of the nine cardinal parameters
4:04 Can too much light cause problems with my cannabis plants?
5:30 How far should my lights be above my cannabis plants?
9:30 What is the optimum light intensity for growing cannabis?
16:59 PAR and PPFD explained
19:30 The best DLI (Daily Light Integral) for Cannabis
24:25 The proper tools to measure light levels
26:40 DLI levels for seedlings/cuttings
27:20 Photo periods and light pollution thresholds during dark periods
30:20 New light pollution sensors
31:30 Light requirements of different cultivars
32:50 Light quality effect on the synthesis of cannabinoids and terpenes
34:17 UV and Far-red effects on cannabis
39:40 Optimal spectrum for veg and flowering
42:52 Design Light Consortium (DLC) and light efficiency listings
* Dr Bruce Bugbee’s bio: https://en.wikipedia.org/wiki/Bruce_Bugbee https://psc.usu.edu/directory/faculty/bugbee-bruce
* Apogee PPFD Handheld meter version – https://www.apogeeinstruments.com/mq-500-full-spectrum-quantum-meter/
* USB Smart Sensor version – https://www.apogeeinstruments.com/sq-520-full-spectrum-smart-quantum-sensor-usb/
* All other models – https://www.apogeeinstruments.com/quantum/
Apogee PAR-FAR and Red – Far-red sensors: https://www.apogeeinstruments.com/red-far-red-and-par-far-sensors/
Apogee microCache Bluetooth micrologger: https://www.apogeeinstruments.com/microcache-bluetooth-micro-logger/
Design Light Consortium: https://www.designlights.org/