What are the Best Light Bulbs to use to Grow Indoor Marijuana Plants
Similarly, most other types of lights, including mercury vapor lamps and halogen bulbs, are unqualified for growing indoor marijuana. If you're looking for (the best) bulbs to buy for growing marijuana indoors, three lighting types fit the suit:
- High Pressure Sodium (HPS) Lights
- Metal Halide (MH) Lights
- Florescent (LED) Lights
High Pressure Sodium (HPS) vs Metal Halite (MH)
High Pressure Sodium (HPS) and Metal Halide (MH) light bulbs are the two types High Intensity Discharge (HID) lights that are used to grow marijuana inside. HID lights are the most powerful light source that's available to the average person.
HPS lights emit a yellowish orange color similar to the Sun's natural spectrum during mid-day. While this type of light promotes flower growth, the lack of blue light in the spectrum produced by HPS light bulbs can sometimes make a marijuana stretch too much during vegetative growth, resulting in long scraggly weed plants.
Switching from MH Lights for Vegetative to HPS Lights for Flowering
A successful indoor grow can be accomplished using either HID light source - i.e. HPS or MH light bulbs - throughout the entire grow. However for the best results, most expert cannabis cultivators recommend switching up your light source from MH lights to HPS lights as the plants initially enter into flowering.
For this reason, MH lights are preferred throughout vegetative growth. Only when marijuana plants are ready to flower do you want to switch the lighting of your indoor grow room to HPS light bulbs. Switching your indoor grow room light bulbs from MH to HPS on the first day of flowering helps to maximize the yield of an indoor grow by producing sturdy and stocky marijuana plants that yield dense buds.