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How to Select the Best Grow Light for Indoor Growing


Its the age old question, which lights work best for growing in doors. This question does not have an exact answer. In this article we will discuss the different kinds of lights, and what their beneits are for different stages of growing.

First lets talk about light, what exactly is light?

According to Wiki, light is Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight.[1] Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).

Now, how do we measure light? Light is measured in nanometers. Light measurement; nanometres (nm) are a measurement of one specific wavelength of light (one specific color, one billionth of a meter on the scale).

Different plants benefit from different lights and light measurements. 

For instance, Marijuana likes light in the spectrum from approximately 420nm through to 750nm. Please see our graph below. (please be advised we do not promote growing marijuana, only in states that it is legal)

Kinds of Light

Blue light, referred to as cool light, encourages compact bushy growth.

Red light, on the opposite end of the spectrum, triggers a hormone response which creates blooms.

Grow lights producing the orange and reddish light typically produce substantial heat, however, some lights are able to produce full spectrum light without the heat.

Grow lights come in many forms, color, types, and sizes. Healthy Harvest offers the full gamut of lighting setups. 

Fluorescent Grow Lights.

They are a common choice for homeowners. Fluorescent lights are reasonably energy efficient and relatively easy to install. A typical fluorescent bulb will last approximately 20,000 hours. Fluorescent light is typically on the blue end of the spectrum. Blue light encourages bushy compact growth which makes them perfect for seed starting. Blue light is also cool to the touch making it possible to place lights within just a few inches of the seedlings.

Check out the 


Please refer to these comparison descriptions via howtogrowmarijuana.com

LED grow lights :

  • There has been much recent controversy among cannabis growers about LED grow lights. Just a couple of years ago the thought of growing weed under LED lighting would have been laughable. However, recent advances in LED technology have led to more and more growers seeing success and LED lighting sources are fast growing in popularity.
  • Check out this LUMIBAR LED STRIP LIGHT


HID grow lights :

  • Choosing the type of lighting to suit your needs is an important decision to make before you startgrowing indoor marijuana. High Intensity Discharge grow lights (HID) remain a popular choice, whether it be HPS or MH particularly for novice growers due to their low set up cost. If you are interested in LED grow lights we discuss that here.

High pressure sodium (HPS) grow lights :

  • High pressure sodium marijuana grow lights are another good choice however they emit a light that is stronger in the orange / red spectrum, around 2,200k, due to their inherent sodium content. If a gardener were to start a young plant under a HPS bulb, she/he would see impressive vertical growth.
  • Check out our USHIO AHS OPTI RED HPS LAMP 400 WATT, 600 WATT 1000 WATT

Metal halide (MH) grow lights – More detail

Check out our SOLARMAX VEG MH 400 WATT & 1000 WATT


Fluorescent (CFL) grow lights :

  • In the old days growing marijuana under fluorescent (CFL) grow lights was pretty useless as they had low output for a large size. However, the new CFL (compact fluorescent lights) grow lights that between them cover the full visible light spectrum have made them a viable alternative.

Check out our 



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