This depends on the type of plants and whether you have natural sunlight available to your garden. As a general rule, when you are in a vegetative stage of plant growth and you have no natural sunlight, run your lights 14-18 hours a day. If you have natural sunlight, it will vary because the sunlight may or may not be direct. It will take a little experimenting to find the best length of time to run your lights. If you are actively fruiting and flowering, the rule is to run your lights 12 hours a day if you have no natural light.
Articles in this section
- How do I clean the inside of my Sun System® Reflector?
- Is the socket assembly sold separate for Sun System® ballasts?
- Does a BT-56 lamp perform better than a BT-37?
- Which Sun System® Reflectors accept BT-56 bulbs?
- Which Sun System® Reflectors have built-in socket assemblies?
- What is a conversion bulb?
- Do I need to wear gloves when handling an HID light bulb?
- Can I run a 430 watt bulb in a 400 watt lighting system?
- Can I run a 1000 watt bulb in my 400 watt lighting system?
- Why do I need glass to get the ETL Listing on a Metal Halide light?