Impact of PPFD Light Levels on Cucumber Plants
November 22, 2018
These cucumber plants were started from seed at the same time. The container on top was grown under a CMH lamp with a higher PPFD, while the container on the bottom was grown under a CFL with a lower PPFD. The plants grown under the higher-intensity lamp are far ahead of those grown under the lower-intensity lamp.
Typically, the higher the PPFD delivery of a grow lamp, the more expensive it is. You can run a less expensive lamp with a lower PPFD value for a longer photoperiod and rack up the same DLI that your plants need. Just be sure not to run the lamp longer than the plants can tolerate.
You can also choose a more expensive lamp with a higher PPFD and run it fewer hours to deliver the same DLI. Provide a long enough photoperiod if one is required.