Grow Lights Full Spectrum For Indoor Plants

Today’s ‘Grow Lights’ contain LED’s (light emitting diodes). LED technology has been around for a long time, and LED lights consume less electricity than the older style incandescent bulbs. And, they have a very long life span. Popular for indoor plants are LED grow lights that are full spectrum.

There are lots of grow light styles and ‘form factors’. In other words, there are many varieties, each with their own methods of installation and use. Grow light systems can get quite expensive, depending on your growing intentions and implementation. However, with that said, lets first look at a quick, easy, and cost effective way to get yourself some grow lights that are full spectrum…for indoor plants ranging from seedlings to maturity.

It’s simply a grow light reflector style bulb (BR30) that screws into a standard light bulb receptacle (E26). The following popular example is a full spectrum grow light reflector bulb.

12Watt, 120W Equivalent, 1000 Lumen

You might use it with a clamp light fixture (enabling lots of mounting/clamp-on options). Another useful mounting option utilizes a hanging extension cord with built-in bulb receptacle at one end (pendant light cord). This allows you to adjust the height as the plants grow (here’s one including on/off switch).

Grow Light Full Spectrum BR30 Reflector Bulb

What is a grow light full spectrum bulb?

A spectrum is a range. In this case, a grow light that’s full spectrum is attempting to mimic the range of wavelengths of the sun, to the extent that it relates to plant growth and photosynthesis. That is, within the technological limitations of the light source.

Manufacturers may also tweak the spectrum (wavelength combination) to facilitate plant growth. For example, chlorophyll (in plants) converts light energy to chemical energy – and evidently absorbs mostly red and blue during photosynthesis.

Grow lights are designed to provide Photosynthetic Active Radiation (PAR) so the plant can undergo photosynthesis like outside in nature (although nothing is better than natural sunlight).

LED grow lights can be customized/designed for specific wavelengths of light. However instead of just one wavelength (color), studies have shown that combinations of green, red, far-red and blue light have beneficial effects on plant growth. Plants grow well under this combination of light. Some call this – full spectrum.

Full spectrum LED grow lights attempt to provide the full array of colors found in sunlight. But again, to an extent within technological limitations of the light source – and/or purposeful design parameters whereby manufacturers may claim patent.

Grow Light Full Spectrum Wavelength

Here’s an example color-graph indicating wavelength of the full spectrum grow light that I’ve linked above (the BR30 reflector style) from a company named ‘Briignite’.

Wavelength Graph Example of Grow Light Full Spectrum

Warm, Cool, Full-Spectrum color temperature

Bulbs are labeled with numbers (for example 3000K or 6000K) which indicate the color temperature of the light with reference to the Kelvin scale of measurement. A 3000K bulb will appear yellower and may be called warm. A 6000K bulb will appear white or have a bluish tint, and may be called cool.

Full-spectrum grow lights offer a light output color combination of both cool and warm light for the best of both worlds.

Grow Light with Adjustable Gooseneck

Here are a few other styles of grow light. I also have the following which is unique with an adjustable gooseneck for each of the three lights. It’s not very big, but perfect for a potted plant during winter. It has adjustments for a timer and intensity.

3 Head – Adjustable

Full Spectrum Grow Light with Adjustable Gooseneck

Hanging Grow Light Full Spectrum

The following brand is popular. A convenient hanging mechanism makes it fairly easy to install. Perhaps a ceiling hook with decorative chain for adjusting height.

Hytekgro Hanging-Style with 250 LED’s

Full Spectrum Hanging Grow Light

Do any of you use plant grow lights?
What has been your experience?

[ Read: Best Color Temperature For Outdoor Security Lighting ]


  1. Grow lights and the setup items needed to run them are good to put up just in case. Never know when you may have to move operations indoors.

    Also good to keep ideas handy of how you’d grow plants indoors if you needed to.

    Anything you can grow outdoors you can grow indoors as well. Just takes a little more engineering. I harvested jalapenos all winter one year.

    1. Have a friend who uses shop lights, led, broad spectrum. close to plants to start everything. with idjits blocking sun with all kinds of contaminants in sky intentionally.. we had better be thinking outside of the box and getting all we can prepositioned for passive heat as well. don’t forget your fertilizers for your set up.. plants require different depending on what you are growing.

  2. Remember the old days when the only place to buy grow lights was from the adds in the back of High Times magazine

    1. Heh Heh Kula,

      Remember the spectracom I think it was called? The white mini grow room with sliding panels. Back in the day when I was kid….

    2. Home grown is alright with me, home grown is how it should be….

  3. I use them in my greenhouse for spring seed starts. I get a more vigorous and less leggy growth. I don’t buy expensive ones so don’t have any comparison (last ones I bought were great value). But the cheap ones work well for me. I turn them on at night and cloudy days, off on sunny days.
    One year I tried growing tomatoes over winter in the greenhouse and ran a halide grow light. I concluded it wasn’t worth the time and expense of running the light. And the light was so bright, figured it might attract unwanted attention!

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