H380 Halo II LED Algae Grow Light - Kessil

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H380 Halo II LED Algae Grow Light - Kessil

100% Recommend this to a friend (14 of 14)

SKU: 209876
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Quick Overview

Growing a macro algae in your refugium or sump can help reduce nitrate and phosphate levels in your saltwater tank while providing a safe harbor for micro-fauna to thrive.

The Halo II H380 has been specifically designed to emit a spectrum that will allow algae and other plants to grow to their fullest potential by targeting the wavelengths and spectrum required. The H380 does have the ability to change spectrum, that will allow you to fine tune the lighting for the best growth of your specific type of algae. Allowing faster growth will therefor allow the algae to remove more nutrients from the water column.

With the different types of Kessil mounting options, like the gooseneck, mounting the H380 is super easy and can mount on almost any sump or in any location.


Note: Mounting options sold separately.


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Product Questions

I want to get this light for my refugium. I will need a tank mount for it. Which mount do i get? Will the a series mounts work? All of the h series mounts are made to set up on a pole and I dont think they are going to work for a tank mount. Am I correct?
Question by: dalon on Mar 2, 2016 2:56:00 AM
Correct, unfortunately these will not work with the standard tank mount and will need to be hung with the included clips at the top. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 2, 2016 5:15:00 PM
I have a small separate refugium area with this light over it. I was considering adding a clam, but i was unsure if this type of light would support a clam. Any ideas?
Question by: Daniel on Jan 24, 2017 9:31:00 AM
Hey there! This light is primarily used for algae growth and not for life support for inhabitants like clams. The biggest concern, besides proper life support spectrum, is that the ever growing algae will eventually take over the clam and starve/over crowd it until it dies. I wouldn't advise it. :-)
Answer by: Admin (Admin) on Jan 28, 2017 7:29:00 AM
Do you recommend running light 24/7 (if used for refugium)? If not, I will need a separate timer? Thanks.
Question by: Floyd Fortuin on Jul 1, 2016 12:05:00 PM
We recommend 18 hours of maximum refugium lighting per day. A timer will be a perfect option for this!
Answer by: Connor (Admin) on Jul 1, 2016 12:46:00 PM
Is this available in white by chance?
Question by: Joe on Jul 1, 2016 8:04:00 PM
Right now, Kessil is only offering the black for this model.
Answer by: Valerie W (Admin) on Jul 5, 2016 11:59:00 AM
Does this light provide the spectrum of light needed to help maintain pH stability in the system when the Display tank lights are turned off? Looking for a light that can provide maximum algae growth and pH stability in the system, any suggestions?
Question by: Hunter on Jul 2, 2016 6:45:00 PM
Great question and tough to answer!
In short the light has been used on several of our tanks including the BRS 160 with success in keeping the algae growth constant without major pH swings between day and night. It certainly has worked on our systems but there are several other variable which can impact pH. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jul 6, 2016 12:23:00 PM
Can this light be controlled with the Apex Neptune controller?
Question by: John Bays on Dec 30, 2016 11:25:00 AM
Great question! You will only be able to control the ON/OFF functionality of this light with the Neptune Apex. This does not work with the 0-10V variable speed ports.
Answer by: Randy (Admin) on Jan 9, 2017 8:59:00 PM
How is the intensity/spectrum controlled on this light? I plan to use it as a refugium light as suggested on BRS series but concerned about how close it will be hung (given stand height restriction) vs shallow refugium height.
Question by: Elisabeth Duarte on Apr 17, 2016 2:05:00 AM
Great question!
This light has a single knob to adjust the intensity of the fixture. There is only 2 spectrums included the grow(recommended for algae) and bloom which is strictly used in hydroponics or plant flowering. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Apr 20, 2016 3:19:00 PM
Controllable (Apex?).
Question by: Luke on Jan 1, 2017 11:54:00 PM
Great question! It is not controllable with the Apex nor the Kessil Spectral Controller.

Answer by: Randy (Admin) on Jan 4, 2017 2:55:00 PM

Full Details

H380 Owners Manual.pdf

Dense Matrix LED Technology

Kessil is a leader when it comes to LED lighting technology. With their Dense Matrix LED's producing a concentrated source of light, and switchable spectrum every wavelength within the spectrum is mixed perfectly allowing even and full growth. The H380 now has 30% more power than its predecessors allowing for deeper penetration and greater efficiency. The one fixture contains two unique full color spectrum blends with enhanced UV light.


Switchable Spectrum

Extreme Purple - Ideal for the growth phase of algae or plants. This spectrum will produce rapid growth while producing a lush, healthier algae. We suggest tuning the H380 closer to this spectrum to allow faster growth and uptake of nutrients.

Extreme Magenta - Targets the bloom stage, driving plants to increase quality and quantity of yield.



Dimensions - 4.5" x 4" (Length x Diameter)

Coverage - 24" surface diameter by 3' penetration (on average)

Power Supply - 100-240V AC (input) 19 VDC,4.74A (output)

Power Consumption - 90w max


Note: Not compatible with Spectral Controller



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  • Works great! By Jan on 4/18/2017

    I've had this lamp glowing purple over my cheato since 4/1/17 (2 weeks) and the growth has really been great. I would estimate that it has grown at least 2 times the size over this period.
    Tremendously better than the $7 HD compact fluorescent I had been using. What really convinced me to drop all of that money on this light (which is expensive) was something Randy on BRS TV said. There was no way that my cheap HD light was able to compete with the 3x250 watt MH bulbs over my display tank. All of the algae was growing in my display and not in the refugium. Now my tumbling ball of cheato is growing beautifully!
    Very happy with my purchase!
  • Expensive but worth it By Robert on 4/18/2017

    Very expensive at $300 but i would highly recommend. This thing grows chaeto extremely fast and im always bringing a 5 gallon bucket full of chaeto to my LFS because there is so much. This light grows a nice soft chaeto as opposed to the other light i had.
  • Unbelievable Light By Alex on 4/10/2017

    Yes the price is expensive for a fuge light, but it pays off! My chaeto has absolutely exploded with growth under this light. It almost quadrupled in size in two weeks!
  • AMAZING-And Worth It By Michael on 3/30/2017

    I know what you're thinking: $300 for a fuge light? I know. I know. I hemmed and hawed before I finally caved, and I'm so glad I did. This is incredible and does everything it claims (and then some). Trust me, if you have chaeto in your fuge, you want this light.
  • Wow what a light! By RobertP on 3/13/2017

    Yeah it is expensive but it is worth it. I had the clip on light wirh a led grow bulb and my chaeto was growing a little but slow. Had this kessil in a week on the same 12 hr schedule and the chaeto doubled. I left it in another week and the chaeto is a thick mat. Great way to export nitrates and phos.
  • Excellent By Johnny H on 3/4/2017

    Algae isn't the only thing it grows
  • Wow By Jon on 2/10/2017

    Let's just say it works and by that i mean the results are amazing algae growth. You won't be disappointed with this purchase.
  • Grows Like wildfire! By Mark on 1/29/2017

    I installed this light over my sump refugium about one month ago and could not be happier with the results. My chaeto has grown into a thick mat and I just have the light coming on periodically throughout the day for maybe an hour or so or less. I am growing enough chaeto to add to my main display tank so no more buying chaeto for me at this point, it seems. It is working out so well that I am about to buy another one for my main display.

    Of course there are cheaper options here but I like my whole reef tank setup to look like a beautiful well-built setup and not some sort of Frankenstein laboratory contraption. I c ould buy a cheap light from home depot to grow chaeto but ain't nothing like opening my sump cabinet and seeing that nice, sleek looking Kessil H380 hanging there.
  • Nice light By Daniel on 12/31/2016

    I purchased this light in hopes of growing my chaeto in my refugium more aggressively. I have a 135 gallon tank with a sump and a separate 15 gallon refugium. I have been running the light for 16 hour periods for a little over 2 weeks now. My chaeto has probably doubled in size during that period, but I started with only a small softball size clump. Previously, though, my chaeto had pretty much stalled in growth but I was only running 12 watts of white LED's on it. Other reviews I've read talk about having much greater growth than I have experienced, but I suspect that is more a result of my ultra low nutrient system (nitrate is typically 1 ppm - 2 ppm, and my phosphate levels are less than 0.01 ppm).
  • Great Light By Newt on 12/10/2016

    I struggled for years getting cheato to grow. I have tried many different bulbs and setups with limited to no success. I put this light over my sump and instantly my cheato started to grow like crazy. In fact it doubled within a week. I was very impressed. It's price was at a premium, but for the results well worth it.
  • GROWS CHAETO 1000 PAR By SNOTDOC on 12/9/2016

    This thing is insane. It puts out over 1000 PAR about 10" below the light as measured with the Apex meter. It grows so much chaeto I need a larger fuge.
  • great light By medtoad on 9/16/2016

    I love this light. Not only does it produce this cool glow out of my maintainence room, but my Cheoto grows like wildfire. Grows so fast that it actually accumulates oxygen bubbles on it. I called kessil and they stated the "a series" gooseneck also worked with this light. Well, sort of. It comes with some quick ties you can attach to the piece that screws onto the end of the gooseneck that worked well to hang the light. Additionally, I had to modify the rim of my sump to make the gooseneck attachment fit. Prior to this light, I had some problems with cyanobacteria growing on my Cheato, but that has gone away as the wavelengths Cyano needs are not present. Overall, I'd have to say this light was worth the investment.