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Water born – Reflex R15

Posted on Mar 24, 2020 by Julian Mitchell

Cineo’s new Reflex R15 LED light has adopted cooling techniques developed in the computer world. We asked Rich Pierceall, VP, LED Operations, to explain further

Words Julian Mitchell / Pictures Cineo

Can you explain the technology behind creating such a powerful hard light; initially the light source with
the nine LED ring segments around the central emitter, and then how you have dealt with
the power density leading to high heat density?

Thermal density has always been a major physical limitation of any solid-state lighting technology. Although LEDs are 10 times more power efficient than conventional lighting technologies, 80% of the energy consumed is converted into heat. 

When building a single-source directional fixture we realised that conventional methods would not allow the scaling that we were looking for. Liquid cooling has been employed for computer servers for some time; we adapted this strategy with LEDs by formulating an optically transparent dielectric fluid that we could immerse the LEDs directly into. This patented method gives us vast scaling capabilities for both smaller and larger fixtures in the future.

 

What were the choices for cooling the core before you enabled a liquid solution? How easy was is to graft GPU cooling on to LEDs?

We built several thermal and physical models of our radial light engine using conventional materials – solid copper, liquid-cooled copper and finally liquid-cooled only. It’s a bit hard to imagine, but the final Reflex core has no heat sink whatsoever, which drastically reduces its weight.

 

What was the thinking behind the open faced PAR design – what other designs did you consider?

We did consider a Fresnel-style optic initially, but chose a focused parabolic reflector as best suited for the light engine. The light engine has nine concentric zones, so we can create a uniform field in a range from a 15º spot to a 75º flood, as well as offering customisable beam shapes. The parabolic reflector is easily removed and replaced with soft lighting accessories, and will possibly have other hard reflector options in the future.

 

Q Are the Reflex’s control protocols new, or are they similar to previous light designs?

The R15 protocols include all of the basics: DMX/RDM in both 8/16 bit protocols and CRMX wireless DMX. To this, we’ve added capabilities for sACN/ARTNet, Wi-Fi and Bluetooth for future-forward communication standards.

The Reflex’s bubbling core is a mesmerising sight
The Reflex’s bubbling core is a mesmerising sight

How many iterations did you go through before you could attain a CRIe: 90-96 rating? How pioneering is this technology? Is there a higher than average failure rate for the core?

Cineo has extensive material science knowledge. Our digital spectra has been an iterative process; that is we base our photometrics on past experience, starting with our invention of Remote Phosphor Technology. 

We worked with our LED partner to create a Chip Scale Package, giving us a power density of 100 watts per square inch. With Reflex, the LEDs are never exposed to air, so there is no chance of oxidation of the LEDs, which is a common failure. We can also maintain the LED temperature at a comfortable 40ºC, well below the normal operating temperate for LEDs. We are currently running L70 longevity testing on the CSP modules with remarkable results so far.

 

Will there be a range of lights with this new technology at NAB?

NAB will be the debut of the Reflex R15. Watch this space for immersion-cooled fixtures both larger and smaller!

The final Reflex core has no heat sink whatsoever, which drastically reduces weight

Specifications

Output: 125,000 lumen 

Variable white light: 2700-6500K 

CRIe: 90-96 

Digitally variable flat field beam angle: 15˚ to 75˚, local or remote control 

Digitally controlled beam shape, local or remote control Flicker-free dimming, 0-100%, local or remote control 

Intuitive touchscreen, local control

5-pin wired DMX/RDM In, Thru and Re-gen 

Integrated Lumen Radio, CRMX wireless control 

sACN/ArtNet capable: bluetooth ready

Removable reflector with optional soft lighting accessories 

Mounting yoke includes removable Junior Pin 

(3) Reinforced hang points for top hanging 

Input Power: 110-240VAC 1500 watts max 

Integrated power supply 

Fixture Size(lxwxdiameter): 19″L x 31.5″w x 26″ DIA (48.3CMx80cmx66cm) 

Weight: 60lb (27.3kg) 

Environmental temperature range: -20˚C – +40˚ C 

Max. temperature rise: +40˚ C

ETL, cETL, CE pending

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