Frequently Asked Questions

LED grow lights are proven to provide a better spectrum for plant growth, and last much longer than any other horticultural lighting fixture on the market. They use less power, create less heat, and make your grow space easier to manage. As a result, you can grow better plants and save a ton of money on power and air conditioning usage.

Spectrum King’s LED grow lights give you much more light per watt of power used, so you get greater output while creating less heat than bulb fixtures. Not only are our LED grow lights significantly more efficient than bulb fixtures, but they last up to 30X longer too. You get longer life with almost no maintenance required for years to come. You’ll save power, save time and have a much better view of your plants thanks to our patented full spectrum lighting.

We specifically engineer our lights to maximize PAR per watt, pairing massive output with our proven
spectrum, using only the highest quality raw materials and components. Compare our lights to any commercial grade competitor, and you’ll never find another one that offers the same level of performance and features anywhere near our price.

No. Over the course of almost a decade of study, our engineers have experimented with hundreds of spectrum recipes over real plants, and what we offer are the best spectrums we’ve created at the best price possible. Tunable spectrums are interesting, but they have two major downsides for lights:

1) Tunable spectrums require multiple channels and drivers (power supplies) in order to regulate bandwidths, some of which only need to be used sparingly. This adds a great deal of expense to the fixture, which isn’t very helpful when we’re trying to deliver the best bang for your buck.

2) Tunable spectrums have enormous efficiency loss. We make lights that are friendly for your wallet and for the environment, and we don’t want to change that dynamic. In our eyes, it’s better to have some separate add-ons to adjust or add specific spectra, rather than trying to cram everything into a single fixture.

UVA and UVB have their benefits, but they also degrade surrounding diodes and do not need to be switched on all the time. We think UV is best delivered through a cost effective add-on (coming soon), rather than packed into the same frame at the expense of your light’s longevity.

Full spectrum light closely resembles natural sunlight, which plants have been accustomed to for billions of years. Plants thrive when given the quality and intensity of light that they’re accustomed to and have naturally adapted to.

- Phoenix 340W Veg: 1,160 BTU
- Phoenix 680W: 2,320 BTU
- Phoenix 840W: 2,866 BTU
- Phoenix 1050W: 3,582 BTU
- Phoenix 600W Rouge: 2,047 BTU

For more information, see our spec sheets for each light.

IP65 means that our lights are water resistant and dust tight, and can tolerate being sprayed by a nozzle without any adverse effects. They are guaranteed safe for use in wet and humid environments which is a great bonus for your grow. It means your lights won’t get damaged if your fire sprinklers go off, if they get sprayed with a hose, or if they’re exposed to high humidity.

For more information, see our support page.

Our lights have the highest longevity of any commercial grade fixture on the market. They have a Q90 rating of 62,000 hours. This is a photon-based measure of reliability, and it means that our lights will maintain at least 90% of their photon intensity AND spectrum integrity for 62,000 hours of operating time. By comparison, our competitors typically test to an L90 rating, which measures visual intensity, but does not guarantee against spectral shifting.

Our lights have the highest longevity of any commercial grade fixture on the market. They have a Q90 rating of 62,000 hours. This is a photon-based measure of reliability, and it means that our lights will maintain at least 90% of their photon intensity AND spectrum integrity for 62,000 hours of operating time. By comparison, our competitors typically test to an L90 rating, which measures visual intensity, but does not guarantee against spectral shifting.

All can be used for both veg and flowering phases with great success. However, if you have space for it and need maximum yield, we recommend using separate lights tuned specifically for veg and flowering.

Humidity and temperature are related, and you need to be conscious of both in setting the appropriate temperature for your room. In general, if you’re running at a higher temperature, you need to make sure that your humidity matches. The VPD chart below can show you how to get your temperature and
humidity in balance:

All SK lights accept the range of 110-277V (regular stock) and 200-480V (built to order) input power sources and their respective model numbers are their actual rated power consumption. For example, our Phoenix 340 veg light uses 340 watts, our Phoenix 680 uses 680 watts. However, please keep in mind that at higher voltages the lights are slightly more efficient and will draw slightly less power overall.

The kind of plug you chose for your light will depend greatly on where you are geographically. Different territories use different plug types. Take a look at the chart below to find the plug that applies to your plug type requirements.

Any valuable equip you own should be protected by ensuring you are not overloading your circuits. In areas where power is inconsistent with spikes and surges that put your valuable equipment at risk. You should always have a surge protector and if possible a voltage regulator to provide you with peace of mind.

Never! LED lights use diodes, not bulbs. Ours are rated for high performance over 62,000 hours of runtime. To put that in perspective, that’s over a full decade of 12 hour per day use.

Contact our support team through the contact page.

Spectrum King lights provide the most PAR per watt of any commercial fixture on the market. Check out our spec sheets for more information and PAR maps.

Many people ask us for PPF charts and umols /w and why we don’t publish that data. The reason is because the formulas that are used to calculate PAR use a limited spectral range from 400-700nm, as a company that sales a full spectrum light that produces wavelengths outside those ranges we would only be cheating ourselves by not being able to publish what our light is truly capable of, true sunlight quality.