Best 600W HPS Bulbs for Flowering (2022)

When you are growing indoor plants, it is imperative that you use a high-quality and effective grow light. HPS grow lamp is known for that.

HPS grow lamps are known for their ability to support high-yielding plants. That is why HPS is still a popular grow bulb among indoor plant growers.

Although the HPS bulb may sport a very basic grow light design, each of HPS’ grow lights may vary from each other in terms of overall light quality.

That said, you must always use a high-quality HPS grow light to grow your indoor plants. In this article, we will introduce the best 600W HPS grow bulbs that are well suited for flowering plants.

Best 600W HPS Bulbs For Flowering: Top Five Lamps

We’ve consulted with several other several expert indoor growers to find out which 600W HPS grow bulb they recommend for flowering plants.

Here are the top picks, which includes our own considerations as well:

Image Product Details
sample-table__imageOur Top PickUshio HPS Lamp
  • Best Value
  • Optimized for flowering
Check Price ->
sample-table__imageDigilux HPS
  • Best Quality
  • More Expensive
Check Price ->
sample-table__imageEye Hortilux HPS
  • 25% more blue light
  • 1 year warranty
Check Price ->
sample-table__imagePlantmax
  • Inexpensive Option
  • Slightly less output
Check Price ->
sample-table__imageVIVOSUN Full Kit
  • Includes all equipment
  • Get started quickly
Check Price ->

1. Ushio HPS Lamp (Enhanced Performance)

First on our list is the crowd favorite: Ushio HPS Lamp. This grow light is one of the most recommended HPS lamps by most experienced indoor plant growers.

Ushio 600W HPS lamp has an enhanced 2100K light spectrum that is optimized for flowering plants. In fact, you cannot find another HPS lamp that is more optimized than that.

This Ushio lamp also has an enhanced blue light emission. So, you can use it not only for the flowering phase but also for your indoor plants’ entire life cycle. That said, blue light is important for your flowering plants as well, making this a good addition to your grow tent setup.

The lamp is very powerful and has a high PAR output of 1,150 μmol/s.

You can use Ushio HPS lamp in all different grow tent settings, including hydroponics and aquaponics.

With Ushio 600W HPS lamp, you get what you pay for. Although not the cheapest grow light on this list, the Ushio grow light is the most affordable grow bulb among the top-rated HPS lamps on the market.

Check Ushio 600W HPS with enhanced performance here.

2. Digilux HPS Lamp

While Ushio is the most affordable among the best HPS lamps out there, Digilux HPS bulb is at the other end of the spectrum. This is the most expensive lamp on our list, but, on the other hand, it is also the best in terms of overall build quality and durability.

This lamp has one of the most optimized light spectrums among all HPS lamps. The spectrum is quite rich in red light and blue light, making this a good grow bulb for a flowering plant.

Digilux also emits high-intensity light with a light output of around 95,000 lumens.

We highly recommend this lamp if you’re searching for a grow bulb that can give the best results on your growing plants.

Digilux is slightly better than Ushio, but because it is more expensive (check its price here), it came in second on our list.

3. Eye Hortilux HPS Lamp

Next on our 600 watt HPS grow light bulb list is the Eye Hortilux. This bulb is another recommended brand of HPS lamps that has outstanding features.

Eye Hortilux 600W HPS lamp has an enhanced and optimized spectrum for flowering plants similar to that of Ushio.

This lamp emits 25% more light in the blue spectral range than other less-optimized HPS lights. The brand also asserts that the lights emit 17% more energy than other HPS lamps.

These bulbs are made in the US, so even though they are expensive lamps (check their prices here), you know that you are getting quality in exchange for your money. As they say, you get what you pay for.

Eye Hortilux lamps are tested before they are packaged, and they also have a full one-year warranty.

With Eye Hortilux you can pull a very high yield from plants, 100% guaranteed.

4. Plantmax 600 Watt

If an expensive light bulb is not your thing and you are looking for something that won’t hurt your wallet, then give Plantmax a go. This light bulb is a more affordable choice compared to the other HPS light bulbs listed here.

Plantmax 600W HPS is a decent lamp for flowering plants. With a 2000K Kelvin rating, this lamp has a warm light spectrum that can induce blooming and increase yield.

It has a light output of 90,000 lumens, slightly less than that of lamps we mentioned before, but the HPS lamp is still considered efficient.

You can get 3 Plantmax 600W HPS lamps for less than the price of one Eshio, Eye Hortilux, or Digilux.

So, if you are searching for an affordable HPS lamp, Plantmax is the perfect grow bulb for your flowering plants (check it here).

5. VIVOSUN 600W Full Kit

VIVOSUN is another inexpensive brand of HPS grow light that sells its products at prices comparable to that of Plantmax.

The brand also offers a full high-quality HPS light kit that makes indoor plant growing much easier for beginners.

Choosing a ballast for your HPS lamp can be a tricky task (more on that below). So, if you’re a starter, VIVOSUN 600W HPS kit will work nicely for you because it has a ballast that is fully compatible with the lamp.

The kit also includes a reflector fixture, hanging equipment, and a timer.

The lamp found in the kit has a light spectrum that is rich in red light but it emits less blue light than other HPS lamps on our list.

VIVOSUN 600W kit is very inexpensive considering all the equipment it contains (you can check it here).

What You Should Know Before Buying An HPS Lamp

So, have you decided on which HPS grow light to buy for your indoor plants? Before you click that checkout button, here are a few tips you should know when buying an HPS lamp.

1- You Need a Ballast to Run an HPS Lamp

To keep your HPS lifespan as long as possible, you will need a ballast.

A ballast regulates the electricity coming into your lamp so it doesn’t get damaged.

Because they need less electricity after warming up, HID lamps, including HPS, will stop working without a ballast.

There are many ballasts on the market and to choose the right one for your HID lamp, you need to do some research.

The main two types of ballasts are magnetic and electric. Each type has its pros and cons.

Electric ballasts can come in a digital form nowadays. Digital ballasts include a microprocessor that can regulate electricity better.

If you don’t know which ballast to choose that will work for your HPS light, the easiest solution will be to buy HPS grow light kits. Kits usually include a compatible ballast that is compatible with the HPS light included in the kit. Just make sure to confirm if a ballast is included before buying a kit.

2- Most HPS Lamps Aren’t Suitable for the Vegetative Phase

HPS lamps that aren’t rich in blue light aren’t suitable for the vegetative phase of your plants.

Most HPS lamps don’t emit enough quantities of blue light, so you need to avoid using them before the flowering stage.

If you use HPS during the vegetative phase, your plants will grow spindly and weak.

You need to use MH lamps that emit enough blue light to fuel the vegetative phase.

MH lamps also need a ballast to run, so choose a ballast that can work for both your MH and HPS lamps.

Learn more about growing plants with lights.

3- LED Grow Lights Are More Optimized for Growth than HPS Lamps

Some growers believe that HPS lamps are better than LED light for plant growth, but that is simply untrue.

First, LED grow light is far more efficient than HPS lamps. The PPF efficacy (PPE) of an HPS lamp is below 1 μmol/J (around 0.9 μmol/J), while most modern LED grow lights have a PPE above 2 μmol/J.

That means an LED grow light emits two times more light than an HPS lamp with the same wattage.

So, if you want to save energy and money, you should use LEDs.

The light spectrums of LED grow lights can also be more optimized than HPS lamps. Although not all LEDs have better light spectrums than HPS lamps, many of them do.

For example, HLG Quantum Boards have better spectrums and are more efficient than HPS lamps.

Since HPS lamps are not very efficient, they emit much more heat than LEDs, which can be a great problem for the indoor plant grower.

LED grow lights, however, can be more expensive than HPS lamps, but this is not true all the time. In some instances, LEDs come cheaper than whole HPS kits. Also, in the long run, you will shed more money when using HPS light bulbs as they have shorter lifespans and require more energy to run compared to using LED grow lights.

So, think twice before buying an HPS lamp today.

Finals Words

There are many high-quality 600W HPS bulbs on the market that will make your plants happy.

But even though HPS lamps can produce excellent results, LED grow lights have emerged to become more optimized for growing.

There are many great LEDs that will work for your plants and that can replace your high-maintenance HPS lamps.

Yet, if you have achieved great results under HPS lamps in the past and you want to replicate your success, you can choose one of the HPS lamps we recommended above.

So, which 600w HPS bulb is your favorite? Are you still using HPS bulb in growing indoor plans or upgraded to a LED grow light kit? We would love to hear what you think. Share your thoughts and suggestions in a comment below. Happy growing!

Blogger, Gardener | + posts

I'm Jad, a biologist, blogger, and experienced indoor gardener. I am knowledgeable in plant biology, particularly in plant cultivation and propagation. I founded HerbsWithin.com in 2019 to share my knowledge in indoor gardening with passionate home growers.