Best Solar Grow Lights

Best Solar Grow Lights

Many indoor growers are looking for ways to reduce their costs and environmental impact. I’ve dreamed of using solar power lamps indoors in my own solar grow room and the radical idea of vertical farming excites me. Solar powered grow lights allow you to control light cycles, determining and influencing the growth phase of your plants while minimizing or eliminating the use of mainline power.

Many crops can be grown indoors, but cannabis and micro greens are considered some of the most profitable crops by farmers. In this guide we will focus on how to choose the best indoor solar powered lighting.

Around 80% of Americans live in urban areas. As more people collect in large cities looking for work, we must come up with creative solutions for growing food and commodity crops within those cities and surrounding areas. Vertical farming and container farms are becoming more prevalent and the desire to grow ones own food indoors is increasing as our environment and food production needs change. Gone are the days of cheap fossil fuel and careless burning of energy resources. We need solutions and solar is a viable option.

We will be discussing solar grow lights and the variables you should consider before making a purchase. Energy usage, light spectrum, light intensity, generated heat, and size of your grow will all need to be balanced to achieve success with indoor solar powered lighting. With several light options to choose from we will go over types of lights, what to look for in a light, and additional things you should consider purchasing for your solar powered grow room.

Solar Grow Lights Reviewed

1. ECRU LED Grow Lights

If you want to grow vegetables and fruits in an indoor setup, using grow lights will be necessary. However, buying the apt grow light will not be easy. Try this full spectrum grow light that emulates solar light and offers you lots of control. You get both cool white light and warm lighting, as per your indoor harvesting needs.  The light comes with a rotational arm and 180 degree rotation is supported. It offers more brightness than typical LED lights. You get the brightness of an incandescent bulb with 150 watt output at a fraction of running cost. You can save up to 40% on the energy bills. This light matches kelvin scale and sunlight spectrum. So, you can use it for practically all phases of plant growth. The coampny is offering 1 year warranty on this light. It comes with IP65 rating.

2. Sulida Solar Plant Grow Light

You want to have a garden replete with vegetables and flowers but lack time or manpower to look after the plants? Try this solar powered grow light and watch your flowers bloom like never before. There are different colored LED lamps and that ensures optimal growth. The Red LED chips are ideal for germination and flowering while the blue LED chips aid in chlorophyll synthesis and germination.

The grow lights are completely weather resistant. The lamps have rugged ABS plastic construction and come with sealing. You need not fret about installation as there is no wiring involved. It runs on only solar power and at night the light turns on automatically. No matter what type of plants you have in the garden, these solar grow lights will come in handy. Its inbuilt 1200mAh Battery is durable. In the pack, you get a user manual along with the solar grow light.


Choosing indoor grow lights can be tough. However, you can go for this optimal spectrum grow light that emulates sunlight perfectly and watch your indoors plants grow and bloom. It comes with UL certification. It is also safe and has Fire-Resistant reflectors. You can choose from modes ideal for blooming and vegetation as per your needs. The light has high speed quiet fans and aluminum cooling heat sinks for superior heat dissipation. You get 3 years warranty on this product. Its daisy chain feature enables you to use several lights at the same time. Once you use this advanced grow light, you won’t look at anything else!

Types of Solar Grower Lights

There are three main categories of light systems you can use for your Indoor solar greenhouse lights.


These bulbs can be good for smaller grows, house plants, seedlings, or supplementary light. There are three bulb styles to choose from (T12, T8, and T5). The T denotes tube while the number indicates how many eighths of an inch the tubes diameter is. T12 lights, which are being phased out, generate electricity through electromagnetic induction, a less efficient method compared to the electronic circuitry in newer model lights.

The main difference between T8 and T5 lights is size. T5 lights are 40 percent smaller but can contain just as much or more light energy than T8 fluorescents. T5 lights are the most expensive option but will give you the best results. These lights are pretty energy efficient but won’t work for larger grows or large flowering plants.


These lights are compact, safe, use less electricity, have a greater light intensity, and generate less heat compared to more traditional lighting options. NASA was a pioneer in LED use as a way to grow plants in space and induce alertness in astronauts. We are able to control the light spectrum emitted from the LED by altering the material they are made of, enabling creation of light in the photosynthetic spectrum while reducing other wave lengths.

This reduces power needed and heat produced while still exceeding performance of other light systems. Another large benefit of LEDs over more powerful HID bulbs are the ability to use a varying light spectrum to encourage the growth you want. LED style lighting would be my first choice for a solar powered grow. LEDs are an expensive initial investment but will pay themselves off in the long term. With the right expectations and planning, off grid LED lighting can be possible

High intensity discharge, or HID

This grow lights are extremely powerful but are expensive to run, hot, and power hungry. They are great for plants that need high intensity light to flower and fruit and are best for commercial growers who have a larger budget and aren’t as concerned with energy usage.

They come in two varieties that are usually used in conjunction with one another. High pressure sodium (HPS) bulbs produce low spectrum(red) light used in the flowering of plants. Metal halide (MH) bulbs, with their high spectrum(blue) light are used for vegetative growth. Both vegetative and bloom spectrum lighting must be used for the best results. Keep in mind you need to purchase two sets of bulbs and possibly two different ballasts, depending on model chosen, when using this system.

Vegetative vs Bloom

When growing with indoor grow lamps farmers must vary light spectrum and day length to get the desired growth from their plants. The growth before flowering is considered the vegetative stage and is controlled by day length. For example, with cannabis, lights should be lit for around 18 hours in a bluer spectrum light to encourage vegetative growth.

The second phase is considered the bloom phase, where the plant will produce flowers and fruit. This stage of growth requires longer nights compared to the vegetative stage, usually a 12/12-hour split, with a light geared more toward the red spectrum.

Light Spectrum

Light from the sun contains the entire spectrum from ultraviolet (UV) to infrared. Plant biologists consider 400nm(red)- 700nm(blue) wavelength light available to plants for photosynthesis. Grow lights that cover this full spectrum will give you the best growing results. Some light models have an available switch that can set the light to either vegetative or bloom growth.  

This is a useful feature as it reduces the need for additional lights while improving grow quality. Look for spectroradiometric data from manufacturers that measures energy in watts per wavelength. Utilizing data will allow you to compare wave lengths of light available to your plants.

Light Intensity

Different plants need different light intensities. Even single plants require different intensities during different growth stages. Light intensity given off by grow lights is measured in watts. A more specific measurement is Photosynthetic photon flux density, or PPFD, measured in μMol/m2/s.

This measurement tells you the PAR (photosynthetically available radiation) usable for plant growth, or the number of available light particles hitting a square meter area in one second. Full sun provides approximately 2000 μMol/m2/s. Intensity can be varied by purchasing a more powerful light or moving the light closer to your plants.

Duration (Light Cycles)

As plants progress through their growing cycle we can influence biological processes such as the growth rate and the setting of buds/fruit by altering light cycles. A light cycle is simply how much light time and dark time the plant gets daily. When a plant is exposed to light radiation it is able to chemically convert this energy, along with carbon dioxide and water, into oxygen and glucose.

This energy is stored in the plants and used for cellular respiration. Cellular respiration occurs during dark hours. The plant chemically converts its stored glucose into carbon dioxide, water, and ATP energy molecules used for plant growth and reproduction.

Energy Usage

The amount of energy required to grow plants is immense and you must consider this when choosing which light system to use. Power needs will change as the plants progress through their growth cycle and the farmer starts altering day length and light spectrum.

LED lights will use the least amount of energy, while HID lighting will use the most. Fluorescent lighting is also efficient and can be good for small grows and supplementary light. I suggest using a LED grow lights system as they are energy efficient and can deliver a great product, saving you money in the long run.

Short vs Long Day Plants

Different varieties of plants have differing light needs. Short day plants only produce flowers when day length is less than about 12 hours. These include many springs and fall flowering plants like poinsettias and chrysanthemums. Long day plants on the other hand, require more than 12 hours of sunlight to enter bloom.

Summer crops like lettuce, spinach, potatoes, and California poppies bloom when the days are long. Other plants like tomatoes, corn, cucumbers, and some strawberries are considered day-neutral. These plants form flowers regardless of day length. Keeping day lengths in mind can help you choose crops that use less light, saving energy.

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