Your light settings will change based on the stage your recipe is in.
For stage 1, 2 and 3, your lights will be on for 20 hours a day. Your young plant will sleep for only 4 hours during these stages.
Once stage 4 (i.e. Transition) begins, the lights will change drastically. You'll now see that your lights are on for 12 hours a day, and the plant sleeps for the other 12. This is the beginning of the flowering stages 4, 5 and 6. Please be aware that this is specific to photoperiod dependent seeds only.
Example: Generic - Hybrid
This recipe (Figure 1) has 3 vegetative stages and 3 flowering stages. We have just entered the early germination stage, and our plant is 11 days old. It has another month, or 27 days, left to grow before we flip to 12 hours of darkness each day so it starts producing flowers.
Our goal is to have the plant as tall as the second fan on the back wall when it moves into stage 4. If you top or fim your plant, add a week to the stage you conduct these tactics in. This is because it will stress your plant, so it will need time to recover to continue it's growth.
Fig 1. This is what a recipe's schedule looks like.
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