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growing marijuana led vs hps

Growing marijuana led vs hps

LED grow lights can burn your leaves and buds even if the temperature is perfect. The fact is that LED grow lights are so powerful they can actually deliver too much light to your plants and cause light burn.

And when it comes to what yields to expect, there are almost no companies that will tell you anything. In fact, most LED grow light companies won’t even talk about cannabis, never mind actually test their grow lights on real cannabis plants. To be fair, many companies selling HPS lights aren’t talking about cannabis or showing their products working for cannabis. However, HPS’ are in a unique situation in that their ability to grow cannabis isn’t questioned, it’s inconvenience (i.e. heat management) of using them that we all have a problem with.

Efficiency – LED diodes are very electrically efficient, which could save you money over time (though the jury is still out when it comes to whether LEDs get better yields than HPS watt-for-watt). Additionally, where an HPS bulb needs to be replaced every few grows to maintain its brightness, individual LED diodes keep their brightness practically forever. With an LED grow light, it’s almost certain something else will break on the lamp before any diodes start losing their brightness.

Often when LEDs are kept too close there aren’t any immediate symptoms. There may be yellowing and leaf death that happens slowly over the course of days or weeks. These symptoms tend to accelerate during the second half of the flowering stage and eventually spread to the buds themselves. When only the leaves directly under the LED are showing problems, it might be caused by the LED grow light being too close.

Problem: Premium LED grow lights often cost 3-10 times more than new HPS grow lights. That being said, there are cost-effective options.

Growing marijuana led vs hps

……….An HPS fixture, bulb, and ballast has a lower start-up cost compared to the standard Full Spectrum LED fixture. All major grow rooms, greenhouses, and facilities need HVAC regardless of whether HPS or LED is used. The difference is in the size and usage of these auxiliary components. Upfront there is an investment, but these fixtures are going to last you a minimum of ten years versus having to buy two new bulbs for every fixture once a year.

Another advantage of LED is that these lights generally have higher levels of PAR deeper into the canopy because of the dynamic light source. It is a wider and longer fixture, also allowing you to be able to grow a larger number of denser, stronger plants.

There are many advantages to growing cannabis under LEDs, including safety, yield, cost, and maintenance.


……….HPS lamps must be changed every 2-3 cycles (6-9 months) because they lose efficiency and PPF. A standard 3 month grow cycle requires 16 hours of light a day for the first month in the vegetation stage (480 hours) and 12 hours of light a day for the second and third month in the flowering stage (720 hours). That means you’re getting approximately 2,400-3,600 hours out of your standard HPS bulb.

LED: .015¢ per hour

………………..You buy an LED fixture and look at your warranty. It is 100,000 hours, the industry standard. Although your fixture was a lot more expensive up front compared to an HPS setup, here is why it is worth it.

………………………………….Quick Maths!:

Cost Confusion: Although you may be paying more for an LED fixture or setup, you’ll see the return of investment within the first two years. Many growers idolize the ‘low cost’ of an HPS fixture and lamp but they disregard so many other costly factors.

……….The reason HPS lamps generate so much heat is because the light is created by the ignition of gas within the lamp. LED fixtures utilize very thin layers of semiconductor material. These materials either have an excess or a deficient amount. This disparity between layers causes electrons to move therein generating light. The heat per watt is far greater with an HPS fixture compared to LED. This technology is far more efficient in transferring energy in to light, as it produces less heat and has a higher wattage equivalency to HPS (600w vs 1000w).

Growing marijuana led vs hps

This rush for pollination forces the female cannabis plant to push out ever more pistils to find pollen. Since we grow cannabis with only female flowers, they increase in size giving us the big buds we seek.

This stage includes juveniles that have at least 3 nodes. The vegetative stage is an integral part of the cannabis plants’ lifecycle since it lays the overall foundation.

Join us as we compare HPS vs LED to determine which system works best for you.

When growing in a frigid environment, low-heat emitting lights are not the best option because your plants will become affected by the cold temperature.

Flowering Stage: HPS vs LED

On the other hand, since the vegetative stage requires 18 hours or more of light, the power from HIDs will mean a massive electricity bill.

Their low-wattage will keep your electricity bill in the green, but their overall lack of intensity will keep your plants craving more.

CFLs work well during the juvenile stage of growth, but as the plant grows and demands more light, CFLs underperform in stimulating new and vigorous leaf growth.

Seedling Stage: HPS vs LED

Are you growing in a grow tent or in a warehouse? Although these two examples are polar opposites, they still ask the same question. The space of your grow room will significantly impact your decision on which lights to purchase.

HPS is also a HID style grow light. These lights also range from 250-1,000-watts. HPS lights are known for their red and orange wavelength that is meant to increase the overall size of buds and speed up the transition from the vegetative phase to the flowering stage.