ThePineapple - Lightbulbs and you

Lightbulbs and you

How to choose the right lights for your indoor grow

Hello, again my lovelies! In today's edition of the ever-growing grow series, we will be chit-chatting...well, I will be chit-chatting about two of the most common lights used in indoor growing. High-Pressure Sodium Lights and Metal Halide Lights are the most prevalent amongst indoor growers both big and small as they provide some of the best color spectrum varieties for growing cannabis. 

© gritsalak -

Before we delve into lighting, I would be an idiot if I didn't at least briefly mention the spectrum of colors given off in light and why they are so damn important. Choosing the right lighting for your plant is not as simple as selecting lights for a Christmas tree. In order for your plant to grow, it will need to be exposed to the right kind of light. Light, which is made up of separate bands of colors in a full spectrum. Each of the colors in the spectrum that your lighting emits will send the plant a separate signal and promote a different type of growth. This is why you will need to find lights that emit colors that are within the Photosynthetically Active Radiation zone or PAR zone. The PAR zone is reserved for lighting that gives off rays within the blue and red range of color. Okay, enough on the color spectrum. Onto the lights!

(© Fukume -

High-Pressure Sodium lights give off an orange-hued glow similar to the fall sun and have the highest concentration of yellow, orange, and red light. It is due to these color emissions that many indoor growers use these high-pressure sodium lights as it has been noticed that these lights, when used correctly, can help aid in the overall flower production. High-pressure sodium lights (HP sodium) are available in watt sizes ranging from 35 watts to 1000 watts. Having been around these lights, in particular, I would say that if you are doing a small indoor grow of two plants, keep the watt range between 150 and 200 watts. 1000 watt HP sodium lights are magnificent but typically only used by large producers, capable of growing 3,500 plants in a single grow space. One thing you should remember if selecting HP sodium lights is that yes, the light from the red end of the spectrum aids in overall flower production, but they don't always contribute to the production of tight, full, and juicy buds. Cannabis plants need white light while producing flowers to help them create those tight buds. That is where our lovely Metal Halide lights come into the picture. 

Robson90 -

Metal Halide lights are one of the most efficient sources of synthetic white light that are easily available to growers. Due to the white light given off by metal halide lights, some indoor growers choose to use these in tandem with HP sodium lights while their plants are in their flowering stage to help their plants produce tight buds. When HP sodium lights and Metal Halide lights are used together at a one-to-one ratio (1000 watts of HP sodium with 1000 watts metal halide) the light available to the plant is doubled and has both beneficial spectrums of color; white and red. Metal Halide lighting is beneficial during the cannabis plants' vegetative stage as it requires at least 18 hours of bright light each day to grow bigger and create more nodes for flowers to eventually form. It's important to know that these lights are also available in a variety of watt sizes ranging from 175 watts to 1500 watts. For those of you lovelies that are looking to grow on a small scale, you will be looking for lights within the 150 watts to 200-watts range. 

Another handy thing to know about these beautifully bright bulbs is that they give off UV-A, UV-B, and UV-C rays. Given that indoor grows do not have the natural atmosphere to dilute these rays, you will want to invest in some blue-tinted growers' goggles to help protect your beautiful eyes. UV-C rays are very intense and quite harmful to the eyes over time so check yo-self before you wreck yo-self! 

Okay, lovelies, that brings the lighting article to a close. I hope you enjoy ruminating on the illuminating of your plants! Kisses!