Also Know as the Gas Light Routine

We don’t care where the name came from but we do know that the GLR will save money on energy bills and encourage your plant to start flowering a little bit faster.

The GLR is only used for the vegetative cycle.

This light routine is a little different with three objectives:

  1. Giving the plant the light it needs for vigorous root and foliage development
  2. Save energy resulting in a lower energy bill
  3. Causes the plant to flower faster than any other light schedule

The GLR light schedule is as follows:

  • 12 hours of light on
  • 5.5 hours of light off
  • 1 hour of light on
  • 5.5 hours of light off

This results in running the lights for 13 hours each day resulting in a significant savings and when it comes time to start the flowering cycle, your buds will start forming quicker.

NOTE: some strains will flower using GLR so watch for that. If you do see the flowering cycle commence, just revert back to your regular vegetative hours.


Some growers use a full 24 hours of light and others use 18 hours of light and 6 hours of darkness. On one hand, the grower is trying to mimic the summer daylight hours (18 on 6 off) while on the other hand the grower is trying to push their plants to grow  faster (24 on) with no rest or relief from the light.

We have tried both and see no advantage to running the lights 24 hours on. The plants look fine and the yields are similar what ever method you use. Of course running your lights for 24 hours will increase  your energy bill. Try the GLR and watch your energy bills drop.


Most growers use a 12 hours of light on and 12 hours off.

Other growers, including us start with 12 on and 12 off than every 2 weeks increase the off by 30 minutes trying to mimic the end of summer/fall sunlight.


I consider the marijuana laws of the United States of America including the actual State laws to be arguably the biggest scam on it's citizens ever committed by politicians for their own PERSONAL agenda. Consider this blog my peaceful protest against stupidity. I've made every mistake you can think of growing my own and have turned all the techno mumbo jumbo into a simple system to grow your own pot that's fool-proof. Real simple; follow my method and you'll have success right off the bat. Feel free to ask me any questions you may have. Use the contact pages and most posts/pages have a comment section. I'm here every day and will answer ASAP. Hey, thanks for coming over, leave me comment once in awhile, let me know how I'm doing. Thanks, Vince

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