Let's start from the basics.

We make Relio² here, in the hills of Northern Italy, with the utmost precision.

It's a symphony of hard work and knowledge, and we want to share this journey with you.

Light Quality

Color Rendition is the ability of a white light source to faithfully represent the colors of objects and surfaces illuminated with it.
Relio² is engineered to emit a light comparable to Sunlight, in terms of purity, concentration and color rendition.

Improved Color Separation

Typical LED lamps favour energy efficiency at the cost of spectrum continuity: that leads to unsatisfactory color rendition.
Relio² emits a continuous spectrum of visible light, improving color clarity and making the subltlest color variations more apparent to cameras and naked eyes.

Studio-grade Optics

To achieve maximum color rendition and flux intensity, we gave Relio² an exceptional kind of TIR optics.
It's a 2-stage collimation system, where a multitude of superficial micro-domes furtherly homogenizes the chromaticity of the emitted light.
The smoothness of Relio² light is unmatched.

State-of-the-art Light Quality

Relio² light is certified and calibrated by professional spectrophotometry testing.
The results? An impressive 98% native TLCI and more than 40.000 lux @ 25cm.
We perform all the test in our laboratories and make the results available for download.

Request our Light-Quality Report Download our Light-Quality Report

100% TLCI with zeroing LUTs

If you are a serious filmmaker or a scientist, you’ll really like this... it’s a world’s first!
We give you the spectrum-based LUTs of Relio², to be applied before any other post-processing act.
This gives you a perfect, “ideal-world” starting point to apply other LUTs with 100% color consistency.

Request our zeroing LUTs Download our zeroing LUTs

Science-Backed Engineering

We did our homework.
Back in 2014, the Original Relio was the first portable ultra-high-CRI device in the world.
Relio² is backed by 4 more years of research, and we published a technical paper to document our engineering choices.
Beware of imitations and clones!

Request our Technical Paper Download our Technical Paper

Modular Design

Relio² brings the concept of modularity to a whole new level.
It's the first device that can be shaped either into a wall, a ceiling, a shelf or a desktop lamp.
The minimal footprint makes it practical and incredibly unobtrusive.

- Mix, Combine, Reshape

A picture is worth a thousand words.
One modular Base can host up to 5x Relio² elements.
Combine multiple Base kits to create and expand your ideal lighting setup.
Are you done? Unmount. Remix. Remount. ...Repeat!

- The Modularity Core

Relio² is an instrument that loves standards.
Both the lamp module and the Base kit use a standard 1/4-20 UNC “camera mount” thread.
The slotted Base can host up to 3x rods.
Finely machined stainless-steel caps cover the unused slots on the Base.

- The Mounting Core

Neodymium magnets and anti-slip foam pads generate more than 10Kg of attraction force, to allow both a safe horizontal and vertical placement.
For non-magnetic surfaces, we give you 4x metallic washers to apply on the desired material.
On the Base, we even put a slotted notch: use it to hang Relio² on wall-protuding pins.

- Degrees of Freedom

Each lamp module has full 360º rotational freedom on both axes.
This still holds true when combining multiple Relio² units on the same Base.
No tools required: the adjustments are made by hand.

- Inter­changeable Lenses

How’d you call a light modular”, without a full set of interchangeable lenses?
Swap the optics on each Relio² lamp element, and make it either a spotlight or a floodlight.
The Base kit includes 10º, 25º, 60º lenses and one special 10×70º asymmetrical lens.
The Desk kit includes an additional, larger 90º lens.

- Cable Management

On the bottom, a T-shaped passage allows for many elegant takes on cable management.
Thanks to the ultra-slim foam pads that protude for just 0.4mm, the cable will stay firmly in place.

The Elec­tronics

We firmly believe in product longevity, so we designed miniaturized, upgradeable, robust electronics that embrace the most advanced technologies available today.
It’s a tiny work of art, indeed.

Ultra High-end Circuitry

USB power and no internal battery: the right combination for many years of continued use.
With durability in mind, we engineered the most complex electronics ever in a device of this size.
To withstand mistreatment, the USB port is reinforced, and the USB cord is magnetic and user-replaceable.
Relio² is so efficient that a single USB power-pack can power it for days.

Official App Available Free!

With our official App, you can wirelessly control Relio² brightness level via Bluetooth®.
We designed a proprietary “Halogen-like” algorithm that tweaks Relio² dimming curve to simulate the afterglow of traditional incandescent lamps.
For use in open spaces or laboratories, the App includes a “Secure mode” and a “Strobe mode”.

Ultra Slow-motion Suitable

Relio² light is so stable that is guaranteed flicker-free up to 10.000 fps.
A rarity: that still holds true when the light is dimmed.
Thanks to Relio² extermely high luminance, it’s a perfect companion for slow-motion macro shots or scientific image acquisition.

Laboratory Use

Relio² can also be dimmed via external microcontrollers like Arduino® and Raspberry-Pi®.
The electronics can operate up to 15V DC and will withstand lightning surges up to 20.000 Volt.
Digital inputs are protected too, and our Bluetooth API is public and fully documented. Neat, huh?

Request our BLE API Docs Download our BLE API Docs

Light Versions

Relio² incorporates the rarest wavelengths available, from world‘s best LED manufacturers.
All Relio² owners will be eligible for the Upgrade Program, the day we’ll release newer, backwards-compatible Relio² upgrades.
After all, it‘s all about light quality, and we‘re very serious about it.

#STUDIO - Premium Whites

Relio² comes in 3 different white spectrums.
When performing color critical-tasks, using calibrated light is a way to certify and add value to your work.
If undecided, pick the 4000K version: it has a neutral white point that is accurate, pleasant and warmer than you may expect.
A real joy for your eyes and cameras.

#ART - Premium Colors

As for the white versions, we managed to cherrypick the most rare and unseen color spectrums.
They’re best suited for artistic or colorimetric purposes.
Their high purity, saturation and peak wavelength are something you’re not used to see.

#LAB - Technical Colors

A journey into the unseen always begins with the right light.
Relio² can be equipped with a full set of Ultraviolet and Infrared LED variants, including the most technologically advanced full-spectrum IR emitters.
Upon request, we can offer tailored wavelengths for scientific or research use. Contact us for information.

Base and Desk Kits

Base Kit is the foundation.
Use it to build modular, expandable sets to attach to walls, ceilings, shelves or camera tripods.
Desk Kit has even more parts.
Use it to transform Relio² into a color-calibrated desktop lamp.
Thanks to its minimal footprint, Relio Desk pushes the boundaries of what a “Desktop Lamp” can do.

BASE - Kit Content

1x Relio² lamp unit; 1x Base system with magnets, caps and pads; 1x short and 1x medium mounting rods with o-rings and bolts; 10º, 25º, 60º, 10×70º lenses; 1x 1.5m magnetic reversible microUSB cable; 1x 3.0m anti-tangle gold-plated premium microUSB cable; 1x premium carrying box.
This kit comes fully assembled.
Refer to Base Kit package content for details.

DESK - Kit Content

All the content of the Base kit, PLUS:
1x long mounting rod; 1x screw-on stainless steel counterweight; 1x central nut-and-bolt hinge system with o-rings; 1x addditional, large aperture 90º lens; 1x protective carrying tube.
This kit comes partially assembled.
Refer to Desk Kit package content for details.

Technical Specifications

Relio² is engineered and manufactured entirely in Italy.
The mechanics, the electronics, the firmware, the Apps, this website: it’s all made by us.
Every detail is the result of precise engineering choices, to give you one of the best professional illuminators ever made.

Properties shared by the whole Relio² lineup
Model number R401
Available wavelengths 3500K, 4000K, 5700K, 660nm, 590nm, 520nm, 470nm, 450nm, 850nm, 1050nm, full- spectrum IR850~1050nm, 360nm, 395nm
CPU ARM Cortex M0 32bit 40MHz, with integrated Bluetooth® LE 4.2 antenna
Certification standards CE, FCC, RoHS, Bluetooth SIG, CRI, TLCI, CQS, TM-30-15, CIE1931, CIE1976, IEC- SDCM
Calibration device Asensetek Lightning Passport Pro
  • Wavelength: ±0.5nm
  • X,Y: ± 0.002 @ 1000lux
  • Lux: ±3%
  • CCT: ±2%
Spectrometries are public Yes Light Quality Report available to download
LED lamp predicted life >50000h At ambient temperatures up to 40ºC
Total MTBF >200000h Estimated
LED is upgradeable in the future Yes We‘ll contact our customers when new LED modules will become available (TBD)
Optics type TIR + Honeycomb pattern
Optics material Clear PMMA Heat-resistant up to 80ºC
Optics aperture (nominal) 10º, 25º, 60º, 90º, 10×70º Nominal aperture, not FWHM
Optics are user-swappable Yes Via the included Hex-key tool
Optics are upgradeable in the future Yes
Body materials AL 6082 “Anticorodal“ aluminum alloy, AISI 316L low-carbon stainless steel alloy
Surface treatment MIL-A-8625F Spec. Type III sulfuric acid hard-anodizing, 30µm, carbon black
Magnets attraction force 9.32kgf total 4 magnets, 2.33kgf each
Magnets are user-removable Yes Via the included Hex-key tool
Power supply
  • +4 ~ +15V DC
  • Continuous protection: ±25V
  • Transient protection (0.1s): ±60V
  • Overshoot protection (10ms): 20kV
Logic-level input
  • +3V ~ +5V DC
  • Continuous protection: ±25V
  • Transient protection (0.1s): ±60V
  • Overshoot protection (10ms): 20kV
  • Logic-level input is on USB Data+ pin; USB Data- pin is NC
Power consumption 5Wh @ 100% brightness
Body-radiated heat 2W @ 100% brightness; estimated, not including visible light energy emitted by the LED
Temperature, Operating 0ºC ~ 60ºC Temperature gradient (non-condensing): 20ºC/h
Temperature, Non-Operating -20ºC ~ 70ºC Temperature gradient (non-condensing): 30ºC/h
Dust and water resistance IP53 With magnetic microUSB plug-end inserted, otherwise IP42
Integrated battery No
LED light ripple <2% @ 750kHz @ full range of brightness, using a high-quality power source
Total electrical efficiency ~90% @ 100% brightness
Flicker-free up to 10000 fps
Light control Pure current drive No PWM modulation
External, logic-level brightness control PWM @ 20kHz Incoming PWM is RC-integrated to a voltage curve
Bluetooth App iOS, Android Google Chrome® web browser controller is coming soon thanks to Chrome’s implementation of WebBLE APIs
Bluetooth range 10m Up to 5m inside, up to 10m outside; varies depending on environment, placement and control device used
Bluetooth antenna can be switched off Yes Achieved by enabling “Secure Mode” inside Relio² App
Bluetooth license Yes, official Bluetooth SIG license ID: D039827
Brightness dimming curve Proprietary Inspired by CIE1931 scotopic curve
Integrated thread UNC 1/4-20 US ANSI B 1.1 standard, 7mm length
Bluetooth API is public Yes BLE API documentation available to download
Published 3D accessories license Creative-Commons-CC
Engineering and manufacturing Made in Italy
TARIC import code for customs declaration HARM Code: Description:
Photographic flashlight apparatus
Properties specific to Relio² CCT variant - 4000K
CCT 4047K ±50K tolerance, with 10º optic installed
CRI (Ra) 95
CRI (Re) 92
CQS 94
TM-30-15 Rf 91
TM-30-15 Rg 98
CIE1931 x = 0.3793, y = 0.3788
CIE1976 x = 0.2235, y = 0.5023
IEC-SDCM <1 SDCM 1-step MacAdam Ellipse
Illumination 39731 lux @ 0.25m With 10º optic installed
PPFD (400-700nm) 625.44 μmol/m2s With 10º optic installed
Properties specific to Relio² CCT variant - 3500K
CCT 3527K ±50K tolerance, with 10º optic installed
CRI (Ra) 95
CRI (Re) 93
CQS 96
TM-30-15 Rf 95
TM-30-15 Rg 99
CIE1931 x = 0.4093, y = 0.4051
CIE1976 x = 0.2235, y = 0.5023
IEC-SDCM 5 SDCM 5-step MacAdam Ellipse
Illumination 49243 lux @ 0.25m With 10º optic installed
PPFD (400-700nm) 782.25 μmol/m2s With 10º optic installed
Properties specific to Relio² CCT variant - 5700K
CCT 5719K ±50K tolerance, with 10º optic installed
CRI (Ra) 93
CRI (Re) 90
CQS 92
TM-30-15 Rf 91
TM-30-15 Rg 98
CIE1931 x = 0.3275, y = 0.3432
CIE1976 x = 0.2235, y = 0.5023
IEC-SDCM 3 SDCM 3-step MacAdam Ellipse
Illumination 59607 lux @ 0.25m With 10º optic installed
PPFD (400-700nm) 929.13 μmol/m2s With 10º optic installed
Relio² Package content - BASE Kit
1x Relio² light unit (35x35x35mm, 80g)
1x Magnetic, anti-slip base with 4x removable neodymium magnets and 2x stainless steel caps
1x 80mm mounting rod
1x 125mm mounting rod
1x Squared bolt with spare EPDM O-rings for coupling the lamp unit with the mounting rods
4x Interchangeable lenses: 10º, 25º, 60º (installed by default), 10×70º nominal
1x 1.5m anti-snag and anti-tangle magnetic nylon cable
1x 3.0m anti-tangle gold-plated premium nylon cable
2x Hex keys to assemble and service the Kit
1x Information card with links to the free, official smartphone apps (iOS, Android)
1x Chromatic calibration card
1x Information card with link to the official user manual (read the manual)
1x Template liner card to correctly drill the wall-mounting holes (download a PDF copy here)
4x Nickel-plated countersunk washers for mounting on non-ferrous surfaces
1x Premium protective carrying box (160x160x85mm, 750g incl. product and accessories)
Relio² Package content - DESK Kit
All the content of the Base Kit, PLUS:
1x 270mm mounting rod
1x Screw-on counterweight, stainless steel
1x Central nut-and-bolt hinge system with spare EPDM O-rings
1x Large aperture optic, 90º nominal
1x Protective carrying tube (310x40mm, 250g incl. product and accessories)
Properties specific to other wavelengths or limited-edition kits
You can ask for additional details and specifications by contacting us.

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Frequently Asked Questions

How do I get a Relio² kit?

Currently, Relio² is sold exclusively on this website.

Does it have an internal battery?

No. We want Relio² to withstand years and years of 24/7 use. An internal battery in such a small and powerful device would be able to power Relio² for just 15 minutes at full brightness, with a lifetime spanning no more than 6 months. Name - if you can - one product with an integrated, non-removable battery that’s still 100% funcional after years of use...

How do I power it up?

Via the external microUSB connector. Every USB outlet in the world capable of providing at least 1A of current is suitable.

Why does Relio² still have a microUSB plug instead of the newer USB-C?

The answer is simple: maximum cable length and cord flexibiity. USB-C is born to transport a lot of data channels, so the internal wire count is 4x more, making it very thick and more rigid. For the same reason, USB-C cables lenght is limited to 2m. In the Relio² Base Kit package, we include 1x 1.5m magnetic, nylon-braided microUSB cable and 1x premium, gold-plated, nylon-braided 3m microUSB cable from a premium brand.

Can I use USB-C to USB-A, or USB-C to microUSB adapters?

Yes, of course.

Is the magnetic cable user-replaceable?

Yes. Contact us for a suitable replacement.

What if I use Relio² a lot and some parts wear out?

We engineered all the Relio² parts subject to normal-use wear and tear to be of common availability. Contact us for suitable replacements.

Does it have a manufacturer warranty? What does it cover?

We offer 2 years of manufacturer warranty on our terms of use and warranty. Please consult our sales terms for details.

How much power does Relio² draw?

1A at 5V DC. Since it integrates a step-down buck converter capable of up to 15V DC, power consumption at higher voltages will be less.

Can I power it up with a car battery or other sources of electricity?

Yes. Every source ranging from 4 to 15V DC is suitable. Input lines are protected from overvoltage and reverse bias. For more info, please consult the manual or our technical specifications.

Is it water resistant?

Yes, moderately up to IP53. For more info, please consult the manual or our technical specifications.

How many units can be operated through the smartphone App?

On iOS, we successfully tested up to 16 devices. On Android, it varies depending on the platform (around 5 units). Please note that aggregate brightness control function is still in development.

Can I develop a custom Bluetooth BLE application?

Yes. You can refer to our BLE API documentation. Please note that developing commercial applications is not permitted unless an explicit consent is received by us. Please contact us for more info.

I need assistance and documentation on how to operate Relio² via an external, wired microcontroller like the Arduino®.

We will provide you with full documentation on how to operate Relio² through logic-level signals. Please contact us for more info.

I need assistance in determining how many Relio² kits I need for my work.

We can do digital simulations tailored to your environment. Drop us a message via the contact form.

Do you ship worldwide?

Yes, with some limitations in some remote areas. If you don't see your Country listed in the shipping form, please contact us.

You said that the LED will be upgradeable. How will you handle that?

This is a commitment and we will honour it in case the technology advances. All the future LED upgrades will be backwards-compatible, so you'll be able to ship your Relio² kits back to us for the upgrade, for a minimal servicing fee.

Can I disassemble the LED and eletronics by myself?

Yes, and it's rather easy to do, but the warranty will be voided.

I accidentally damaged something in my unit. Are spare parts available for sale?

Yes, depending on stock availability. Please contact us and we will help you.

Do you sell physical versions of your 3D-printable accessories?

Currently no, but we partnered with some local and international suppliers that will be able to 3D-print and ship them to you. Please contact us for more info.

I want to sell your 3D-printable accessories.

Yes, why not? We release all our accessories under the Creative Commons CC-BY-4.0 license, so you are free to do that. Please remember that you have to mention us on your sales page. Also, please note that we may also link to 3rd-party items, and they may not share the same license terms of our own accessories. Always check the license bundled with each accessory that you download.

I want to be a reseller of your product.

Sure. Drop us a message via the contact form.

I want to be the exclusive distributor of your product.

Maybe. Drop us a message via the contact form.

Let’s know each-other!

We’re a super-small company that listens to its users.
You can help us make a difference.

Send us a message to unlock all our free accessories.

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Let’s know each-other!

We’re a super-small company that listens to its users.
You can help us make a difference.

Send us a message to unlock all our technical documentation.

The download links will appear immediately.

Let’s know each-other!

We’re a super-small company that listens to its users.
You can help us make a difference.

Send us a message to unlock all our technical documentation.

The download links will appear immediately.

Relio² 2020+ Editions. Now Available!

We engineered some majestic Editions of Relio².

After our successful Kickstarter® campaign, they are ready to be delivered. Click here below to discover more!

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