ReefLED® 50

Smart. Safe. Efficient.

Red Sea’s ReefLED® series is the result of years of research into the lighting needs of corals in artificial environments.


Uniquely designed with a light intensity and spectrum that is 100% utilized by the corals, ReefLED lights are 100% reef-safe & 100% REEF-SPEC®, providing optimal growth, vivid colors, and an elegant gentle shimmer throughout the aquarium.


The ReefLED 50 provides REEF-SPEC PAR levels of 500 beneath the lens at water surface, to 100 at 50cm / 20’’ depth. It is therefore the smart choice for smaller tanks.


At the heart of the unit is a single, compact LED array, providing 50W of REEF-SPEC & Reef-Safe LED light. It includes 40W of multi-wavelength 23,000 Kelvin REEF-SPEC Blue (a proprietary blend of blue, violet and ultraviolet LEDs), together with 10W of 9,000 Kelvin White, and a separate 3W channel for moonlight. This array enables a wide range of REEF–SPEC light that will please both you and your corals.


The ReefLED 50 is also equipped with a built-in Wi-Fi that allows total control via ReefBeat smart aquarium app (which controls all Red Sea devices). The app includes pre-set lighting programs, along with additional features such as sunrise/sunset effects, lunar cycle moon light, random clouds and even an acclimation program for new installations.


  • REEF-SPEC® light output for optimal coral growth and coloration
  • Homogenous light with a gentle shimmer
  • Reef-safe dual-channel color setting plus dedicated moonlights
  • ReefBeat® app for easy set-up, operation, monitoring and notifications
  • Anti-glare recessed lens
Optimal coral growth
Reef safe
Easy setup
App operated

Independent reviews

Reef-safe PAR distribution

ReefLED is Reef-safe as it provides ideal PAR values throughout the aquarium, without hotspots or areas with insufficient light for coral growth. The PAR distribution map shows the actual PAR levels as they vary throughout the cross-section of the aquarium.

ReefLED Programs | PAR vs. PUR

Using PAR measurements only to determine light quality or compatibility of a specific light unit for coral photobiology can be misleading. The PAR measurement was developed to measure the Photosynthetic Active Radiation of plants that is within the visible light region (400 -700 nm).


The Photosynthetic Utilized Radiation or PUR that is relevant for optimal Zooxanthellae photosynthesis is between 360- 480 nm which starts outside the range of visible light (measured by PAR meters) in the UV region and continues into the blue part of the visible light range.


PUR cannot be measured directly but must be calculated by isolating the PUR wavelength intensity data for each wavelength from radio-spectrometer analysis.


The REEF-SPEC Blue channel of the ReefLED is 100% PUR so for this channel the PUR will actually be slightly higher than the measured PAR due to the UV wavelengths that the PAR meter cannot detect.


The 8000K White of the ReefLED has a strong blue peak in the PUR spectrum as well as wavelengths across the whole visible light spectrum and therefore has a PUR of 45% of its PAR.


The actual PUR output of the ReefLED will vary according to the combined settings of the Reef-Spec Blue and White channels.

ReefLED 50 specifications

Recommended usage by tank size

ReefBeat app

  • One interface for all of Red Sea’s smart devices.
  • Easy set-up and operation.
  • On-line monitoring and notifications.

App features

Mounting options

ReefLED "How to" videos

Independent Reviews


Bulk Reef Supply

Plug it in, choose the color I think looks good & walk away


Marine Depot

It minimizes the disco effect many LEDs can have


Reef Builders

Hands down one of the best first-generation lighting products we’ve ever reviewed

Read review at

Kris Arndt, REEFER 425 XL

I picked up the Radions as the right RedSea90 was starting to side dim as you can see on the PAR ... I picked up the Radions as the right RedSea90 was starting to side dim as you can see on the PAR levels. I must say, for the price, I am not impressed with the Radion lights. Good job Red Sea building a quality light and being priced significantly lower that its competitors. This is on a Red Sea 425 Xl. Hope things helps anyone thinking about “upgrading” their lights

read more

Discuss in our Facebook group