Neptune Systems

SKY LED Aquarium Light

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Don't have an Apex? No Problem!

Wirelessly connect to the SKY over Bluetooth and operate it via your mobile device, even if you don't have an Apex Controller.

The Closest to The Sun You Can Get

The SKY is a 200w LED aquarium light, with patented diffuser technology smoothly blending 104 LEDs to create a uniformly blended field of coral-health-optimized light. Taking a cue from nature, the specialized diffuser array mimics the filtering effect of our atmosphere blend the output of the powerful LED array, and solves the common issues of hot spots and disco-ball effects common to most LEDs, achieving the closest output to natural light that we've seen. The SKY also has a large surface area of diffused light at the origin, which emulates the horizon-to-horizon effect of the atmosphere and noticeably reduces shadowing. The SKY can achieve wider and more even coverage with fewer fixtures needed to light your reef aquarium and provide for the health, growth, and color needs of even the most demanding corals.

While there are some that prefer a natural daylight spectrum from their reef lighting, most tend to lean towards a more blue-purple to really make their coral colors pop. No matter what your preference is, the SKY has the programming options and flexibility to acheive the look you desire without sacrificing the quality of light output. 



  • Wired or Wireless Connectivity
  • Can be used with or without an Apex
  • UV LED Enhanced Color Pop
  • Two Dedicated Moonlights (4 LED)
  • Diffused Light
  • Adjustable Shimmer with Optional Shimz
  • Advanced Thermal Management System
  • Near Silent Operation
  • Low Profile and Lightweight
  • Multiple Mounting Options
  • UL and CE Certified


Don't have an Apex? No Problem!

Those without an Apex can wirelessly connect to the SKY over Bluetooth and operate it via their mobile devices. If you do have an Apex controller, the SKY easily connects by its integrated AquaBus cable to an available port on your Apex base unit, energy bar, or modules. This makes set up fast and easy. If you have more than one SKY, the included Y-cable can be used to chain them together and still only take up one AquaBus connection on your Apex.


Advanced Thermal Management

The SKY has an advanced approach to thermal management that is more than just the two fans you see.

So, why two fans? With two fans the SKY can operate them at much lower RPM while keeping the LED cooler. Cooler LEDs mean a longer lifespan for your light. Also, running the fans slower means that the SKY is quieter, in fact, it's the quietest actively-cooled LED in its power-class. The SKY puts out just 33dB at one meter and set to 100%. The leading competitor clocks in at >40dB at 100% power.

Along with these fans a temperature and power monitoring algorithm manages their speed. If one fan were to fail, the other will pick up the slack and keep the SKY running and safely cooled until a replacement is obtained. Also, if for some other reason the SKY cannot adequately cool itself, such as excessively high ambient air temperature, it will throttle the power to the LED to keep them safely cool.


Multiple Mounting Options

In addition to the sleek black Sky Hanging Kit, you now have many other ways to mount the SKY over your aquarium. The Sky is compatible with a number of mounting solutions from EcoTech Marine. The RMS tank mount system is great for those wanting to mount the light on the back of the aquarium. Alternatively, you can use the RMS Arms, Track, & XR30 Slide to mount your Sky across the tank. Perfect for those with eurobraced aquariums or if you have a pesky overflow box or center brace in the way. 


Compatible Tank Mounts


Adjustable Shimmer

As equipped, and with surface water agitation, the SKY provides a gentle shimmer that suits the tastes of most aquarists. We realized early in the SKY development that when you put a diffuser in front of LED, as many lights do, it tends to kill off nearly ALL shimmer. And that’s not good. So we designed a hybrid diffuser that has clear covers, called Shimz, over four openings in the diffuser where the white LED can shine through with no diffusion. These white LED then bring back the shimmer lost by the diffuser – but in just the right amount. But because not everyone has the same taste, we created an option. If you wish to have even less shimmer, SKY Diffused Shimz can be swapped in – available as an optional purchase.




  • Maximum Spread: 30" x 36"
  • Recommended Spread: 24" x 30"


LED Details

  • 104 LEDs (including uv)
  • Dedicated Moonlights
  • 4 Controllable Channels



  • Dimensions: 12.8" x 9.25"
  • Power Input: 100-240VAC 1.8A 50/60Hz
  • Variable Usage (MAX): 219W
  • Mounting Kit: Sold Separately


What's Included?

  • SKY LED Light
  • 219w Meanwell Power Supply
  • Aquabus Y-Cable
  • Orange Logo (pre-installed)
  • Gray Logo
  • 4x M5 Mounting Screws
More Information
UPC 653078004670
Lighting Type LED
Number of LEDs 104
Max. Light Coverage (Length) 36 in.
Max. Light Coverage (Width) 30 in.
Power Consumption 219W
Control Type Bluetooth
Compatible with Controllers Apex
Optional Mounts Wire Suspension, Mounting Arm
Color Black
Power Cord Length 12 Feet
Warranty 12 months
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Product Questions

How do I connect three of these lights together?
Question by: gary mcnew on Jan 26, 2023, 7:41 AM
Thanks for reaching out! The fusion app should walk you through this. if you are having issues please contact neptune!
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 11:00 PM
Who LED's are they using by count? (Cree, Osram and other)
Question by: BigMax on Nov 5, 2022, 9:43 AM
That is not information we have so you may want to reach out to Neptune Systems directly at 408-275-2205 or support@neptunesystems.com to see if they will provide those statistics.
Answer by: Scott F. (BRS Staff) on Nov 9, 2022, 3:43 PM
Are the SKY lights compatible with the AI HMS mounting bracket? If so which one, the 32?
Question by: Jeffrey McCulloch on Nov 3, 2022, 4:25 PM
Is there a ReefBrite Hybrid solution that will work with the SKYs? and would I need the RMS rails etc to do this? Would love an investigates video with some juicy PAR data to demonstrate its effectiveness.

Question by: Michael Nicosia on Nov 3, 2022, 3:21 PM
At this time, there is no specific Reef Brite set up for Neptune Systems Sky. We will reach out to the Investigates Team to see if that is something they will try in the future. As for a Sky mount, you can use https://www.bulkreefsupply.com/sky-hanging-kit-neptune.html, https://www.bulkreefsupply.com/rms-xr30-g5-g6-tank-mount-system-ecotech-marine.html, or https://www.bulkreefsupply.com/universal-led-mounting-bracket-orphek.html.
Answer by: Scott F. (BRS Staff) on Nov 9, 2022, 11:48 AM
What depth are Sky fixtures recommended for? We are building an extra tall reef, 60” L x 18” W x 30” tall. Also, does the Sky offer any of the “bonus” settings like passing clouds or thunderstorm?
Question by: Jessica Lizak on Sep 26, 2022, 10:41 AM
Thanks for the questions! The Sky will do SPS in a tank up to 24" deep, however, with a 30" deep tank you'll want to keep lower light corals below the 24" depth. At this time the Sky has a cloud feature that can be turned on and off, but there is no thunderstorm feature at this time. Let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Sep 30, 2022, 10:12 AM
If I use the RMS rail system to mount 2 skys on the 60" tank it would hold the 8Lbs weight properly?
Question by: Ruben Hernandez on Aug 13, 2022, 6:52 AM
Thanks for the question! We have found the RMS rails to be sturdy enough for the SKY lights. Here at BRS we have 3 of them on a 72" long rail using the suspension kit for the rail and have no issues with excessive sagging of the rail. There is a very slight bow in the middle but nothing that we are concerned with. You should be fine with 2 without issue. Let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Aug 17, 2022, 10:43 AM
How much does the Sky weigh?
Question by: Danny Klos on Apr 19, 2022, 4:51 PM
Hey there,
Thank you for reaching out to us. This light weighs approximately 4 pounds.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Apr 21, 2022, 8:20 AM
So I just bought a 175gal bow front reef tank. 6ft long. How many would I need? I'm thinking three for an even spread but not sure, any advice? Also, are these going on sale anytime soon?
Question by: Kelly Fails on Dec 10, 2021, 11:56 AM
Thank you for reaching out. I would recommend 3 Skys for a 6 foot tank. When we tested them in our lab, we found that a single light per 24 inches of length was adequate. We would recommend a 9 inch mounting height for the light.
Answer by: William Glenn (BRS Staff) on Dec 15, 2021, 1:57 PM
What’s the recommendations for height above the water?
Question by: Sean Jorstad on Dec 3, 2021, 2:27 PM
Thank you for reaching out. On BRSTV Investigates test found that the ideal mounting height for the Sky was 9". Here is a link to the video where we cover our results. We cover mounting height as well as recommended settings.

Answer by: William Glenn (BRS Staff) on Dec 14, 2021, 12:39 PM
Do you need a Neptune controller to operate these lights? Or is it just blue tooth,or an app?
Question by: Sean Jorstad on Dec 3, 2021, 2:21 PM
An Apex controller is recommended for the Sky but they can be controlled via bluetooth using Neptune's Fusion app.
Answer by: William Glenn (BRS Staff) on Dec 14, 2021, 12:35 PM
I know this states 30” spread which would indicate 2 for a 5’ tank, how many is actually recommended for a 60” tank?
Question by: Robert Brode on Nov 5, 2021, 9:11 PM
We would recommend two fixtures for a 60" tank.
Answer by: Matt Lucero (BRS Staff) on Nov 8, 2021, 12:56 PM