HPS or LED Grow Lights for Indoor Gardening?


HPS or LED Grow Lights for Indoor Gardening

When starting an indoor garden or trying to grow plants inside, you need the right gardening tools to such grow lights to keep your plants happy and healthy. A grow light is essential to indoor plants where there is not enough sun indoors to keep plants thriving.

But with so many types of grow lights on the market, it can be difficult to find the best product for your indoor setup. There are a few features to keep in mind when looking for a grow light:

  • Sun spectrum
  • PAR intensity
  • Efficiency
  • Number of watts

Sun Spectrum

Sun spectrum refers to the wavelengths of light produced by a light source—like the sun—that promotes plant growth. Controlling the light spectrum of a grow lamp significantly impacts the growth of plants including how plants flower and the flavor and compactness of crops.

Read More: How to Start Your First Indoor Garden?

PAR Intensity

Photosynthetic active radiation, or PAR, or the spectrum of light wavelengths needed for photosynthesis. Plants need a range of around 400-700 nanometers of light to thrive, but some plants require wavelengths outside of this range. A grow light should accommodate to the PAR intensity your particular plants need.

Read More: Indoor Gardening the Feng Shui Way


Photosynthetic efficiency is the best range where plants will grow. While you might think a grow light just needs to mimic sunlight, not all plants will thrive in sunlight alone. Studies show that a range of light including red and blue light is critical to photosynthesis.

Number of watts

It can be difficult to decide how much wattage you need for your indoor plants, but as a general rule you want a grow light that will accommodate 20 to 40 watts of light per square foot. With a 1000-watt light, you can properly light between 25 and 50 square feet of your indoor garden.

Now that we have explained the features of most grow lights, now to choose what type of grow light is the best option for your indoor plants.

Best HPS Lights For Indoor Growing

High-pressure sodium vapor, or HPS, lights are a specific type of light that contains metals that are evaporated into the gas within the glass bulb, creating light. This type of HPS light has been used since the early 1930s as a reliable light source that can efficiently light large spaces.

For hobbyists, one of the best HPS grow lights is the Sun System HPS 150W Fixture with Ultra Sun Lamp. Best for growing in small areas, it is an efficient, inexpensive option for those who are just starting out.

Commercial growers tend to gravitate toward lights like the Gavita Pro 1000w E-Series Slim Line DE Fixture HPS grow light, which comes in a variety of voltages and covers a wider footprint.

Read More: The Ultimate Beginner’s Guide to Indoor Gardening

Best LED Lights

Today more and more indoor gardeners are turning to LED lights for their plants.

There are many LED lights to choose from but of all the LED grow lights on the market, the Pro-Tech 645w LED light is the best quality and value for your indoor garden. Its foldable design makes it compact and flexible and easy to install. It also consumes 37 percent less energy than HID lamps, making it the most sustainable option on the market.

The Pro-Tech 645w LED Grow light balances power and efficiency by allowing you to maximize your lighting system without breaking the bank in energy costs.

Best used for larger-scale horticulture operations, Pro-Tech is often used for indoor, warehouse operations, especially multi-layer cultivation systems because of the short light spread distance.

Hytekgro LED Grow Light 45W Plant Lights Red Blue White Panel Growing Lamps for Indoor Plants Seedling Vegetable and Flower (2 Pack)
3,045 Reviews
Hytekgro LED Grow Light 45W Plant Lights Red Blue White Panel Growing Lamps for Indoor Plants Seedling Vegetable and Flower (2 Pack)
  • 🌹[Classical Full Spectrum] Compact grow light that puts out the needed light, includes 163pcs (620-660nm)+58pcs blue leds(450-460nm) +4pcs white leds (6500k), which is ideal for all kinds of indoor plants seeding growing and flowering at all growth stages.
  • 🌹[Easy Set-up] This led grow lights are lightweight and very easy to use with the upgraded hanging brackets, system can be built in perfect sturdy condition within one minute. Built in 59’’ power cord could really stand another two feet of length though and make your plants happy.
  • 🌹[Low Heat] ABS plastic material molding hydroponic grow lights panel , excellent Heat control, runs cool and quiet, no harm to your plants. Square shape design maximizes the beam to cover 3ft by 3ft area of plants, recommended to hang at around 6-10 inches for seedling.
  • 🌹[High Efficiency] Plants grow fuller with much stronger and straight stems with these led grow light bulb. Most of the seeds are germinated and sprouting in 2 weeks. Low power consumption save your electric bill, 2 pack design are value for the dollar.
  • 🌹[Worry-Free Warranty] We offer 12 months warranty plus 30 days satisfaction or return guarantee for this grow light kit. Please contact us first if there’s any issue, we promise to response within 24 hours.

Read More: Advanced Platinum Led Grow Lights Review

What is Best? LED or HPS?

Now that you know some of the best grow lights on the market, which type of grow light is the best for indoor plants? Here is a list of pros and cons for each type of light:

Pros of HPS

  • Generally cheaper than LED
  • More efficient and longer-lasting than incandescent bulbs

Cons of HPS

  • Requires a longer warm-up period
  • After the lights are warmed up, they run hot
  • HPS lights contain toxic mercury, which can be dangerous to dispose of, and if the bulb is broken
  • HPS lights are omnidirectional, which means the light needs to be reflected in order to be efficient. This means more parts are required.

Pros of LED lights

  • LEDs last for a long time
  • LEDs are very energy efficient
  • They are generally low maintenance and cost less to repair
  • LEDs can produce a wide variety of colored light without using filters
  • LEDs are more directional than HPS
  • LEDs are more compact than other light systems
  • They also have less warm-up times than HPS

Con of LED Lights

The upfront cost of LED systems can be more expensive; however, the price is continuously decreasing

If you still can’t decide, consider that overall, LED lights are more energy-efficient than HPS grow lights and are more widely used by professional greenhouses either as the sole light source or supplemental light.

LED lights like The Pro-Tech 645w LED Grow light have better efficiency, better spectrum, and higher PAR rating than that of other light systems, making it the best option for indoor growers whether you are a beginner, a hobbyist, or a professional. The Pro-Tech 645w allows you to dial in the right light quality and quantity of light into your space. It is also dimmable which allows you to dial in how much light you need through your plants’ growing cycle.

The Pro-Tech 645w LED light is also built with top-of-the-line components, including high-quality Pro-Tech drivers and premium LEDs from Samsung and Osram, making it the best product in the grow light market.

Read More: The Ultimate Beginner’s Guide to Indoor Gardening


When it comes to your indoor plants, you shouldn’t have to struggle to keep them alive with bad lighting. There are plenty of lighting resources that can supplement your setup, more than just the light of the sun coming through the window.

Now more than ever, there are many technologies that will help your plants thrive in an indoor environment. The Pro-Tech 645w LED light is one of many lights that could upgrade your indoor garden or greenhouse.

There are many factors that make a great indoor garden, but what light you choose is the most important part of your garden’s health and the quality of the crop. Choosing the right to grow light for your garden can be a daunting task, but after choosing the right one, your flowers will be blooming more than ever, crops will taste that much sweeter and your garden flourishing more than ever before you even know it.

SaleBestseller No. 1
Maxesla Grow Lights for Indoor Plants - LED Full Spectrum Plant Light with Stand, Height Adjustable Growing Lamp with Auto On/Off Timer, 10 Levels Dimmable Brightness, Ideal for Home Small Plants
1 Reviews
Maxesla Grow Lights for Indoor Plants - LED Full Spectrum Plant Light with Stand, Height Adjustable Growing Lamp with Auto On/Off Timer, 10 Levels Dimmable Brightness, Ideal for Home Small Plants
  • 【Unique Artistic Design】: The indoor plant lights are carefully designed like a halo for your plants to help them grow better and faster. They are not only plant lights, but also a stylish decoration for any home space, The warm natural light makes them very comfortable to see and to place in your home, they perfectly fit in with your home decor.
  • 【Full Spectrum Grow Light】: It emits all the wavelengths from 380nm to 800nm- just like natural sunlight. With the warm white high efficiency LED diodes & higher PAR output, the grow light greatly promotes indoor growth as it accelerates photosynthesis, ideal for all stages of growth and various of plants such as herbs, succulent, orchids, tomatoes, etc. Save your dark indoor plants via the led grow light! (50,000 hours lifetime.)
  • 【Auto on/off Timer Everyday】: This growing light has 3 cycle timing settings (4/8/12H) which will stay on for 3/9/12 hours, then off for 20/16/12 hours and will automatically turn on and off at the same time the next day, no need to unplug/re-plug. It will take good care of your plants while you are at work or on vacation, easy & convenient!
  • 【Brighter Plant Light with 10 Dimmable Levels】: Our grow light has more new technology LED diodes which makes it brighter and more efficient. Also it has 10 brightness settings, to meet each plant's lighting requirements at different stages, without worrying about burning your plant.
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SaleBestseller No. 2
GooingTop LED Grow Light,6000K Full Spectrum Clip Plant Growing Lamp with White Red LEDs for Indoor Plants,5-Level Dimmable,Auto On Off Timing 4 8 12Hrs
10,812 Reviews
GooingTop LED Grow Light,6000K Full Spectrum Clip Plant Growing Lamp with White Red LEDs for Indoor Plants,5-Level Dimmable,Auto On Off Timing 4 8 12Hrs
  • 6000K White Light - equipped with 10 Red + 74 White LEDs, this growing Lamp is similar to the full-spectrum sunlight at noon,that is professionally designed for indoor garden plants.Moreover, its color rendering index is as high as 95, the light is soft and flicker-free, which is very suitable for reading lamp
  • Timer Function & Multiple Settings - this growing light offer the circular memory timer function with 3 options-4h/8h/12h. When keeping power, it can automatically turn on and off every day according your settings, no more manual operation for you.
  • Easy to Install - with flexible Gooseneck & strong clamp,it allows you to place the growth light in any direction to provide the best lighting angle for your plants,meet the cover around the plant.Powered by USB or AC Power Plug
  • High Efficiency LED Lamp - as for LED power draw this seedling lights just comsume about 10watt and is equavalent to a 50W Halogen Bulb.Estimately monthly cost roughly $2 in electricity (12 hours a day). It is a great gift if you growing some small house plants.
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