Growing Marijuana Indoors: What is the Best Lighting System for your Marijuana Plants?

Grow ventilator tent_1If you are growing marijuana indoors, one important factor to consider is the light source. The amount of light that is supplied to your marijuana plants is crucial for its growth. You need to be able to choose a lighting system that will provide the right amount of light to supply to your marijuana plants. That is why choosing the best lighting system for your marijuana plants is an essential decision to make when you are thinking of growing marijuana indoors.

Different Lighting Systems for Growing Marijuana Indoors

High Intensity Discharge Lamps (HID)

This kind of light source is easier to use compared to fluorescent lights. And it is also more efficient to use. It has low wattage and at times sold for outdoor use. Lights with high wattage are usually used to light up streets, parking lots, stadiums and other large areas. This light source has to types:

Metal Halides

This kind of light emits a white light that is slightly bluish. They are usually used to light stadiums, convention centers, gymnasiums and other large areas where you want a natural looking light. For growing marijuana, you would want to use this during the vegetative stage of your marijuana plants.

High Pressure Sodium

This light emits a pink or amber light. They are usually used for parking lights and other areas that light color is not essential. This is more efficient than metal halides HIDs. They produce more light and use lesser amount of wattage. HPS can be used alone without causing a detrimental effect on the plants and promote faster plant growth than metal halides during the vegetative and flowering growth stages:


when you say indoor lights, the first kind that comes to mind are fluorescent lights. If you are to use this light, there are advantages and disadvantages for this. This kind of light source has a light spectrum that can use more effectively. But the light emitted by fluorescent lights covers a large area so it is not concentrated directly on your marijuana plants. That is why constant readjusting is needed to make sure that it is directed to your marijuana plants. Fluorescents are very useful for cloning and starting seedlings. They produce and supply more gentle light than any other kind of light source.


You need to be able to use these lighting systems properly. Here are some points that you need to remember when you use grow lights. When you use fluorescent light you need to position it three inches from your marijuana plants. For HID lights, here are the distances from the marijuana plants:

  • 1000 Watts: Twelve to eighteen inches

  • 600 Watts: Eight to sixteen inches

  • 400 Watts: Eight to sixteen inches

  • 250 Watts (or lower): As close as possible

Leave a Reply

Your email address will not be published. Required fields are marked *