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LED FAQ

Questions & Answers

LED FAQ

Which LED supplier did you choose and why?

Cree is the manufacturer of choice. They are currently the largest LED die supplier in the market. Cree has the top rated LED in terms of reliability and lumen output for this application.

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Can you supply an IESNA LM-79 test report from an independent 3rd party laboratory for your fixture and an .ies file?

Yes, all of our fixtures are tested by a third party lab in accordance with IESNA LM-79.

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Has your LED supplier provided an IESNA LM-80 test report?

Yes, the Cree have been tested to IESNA LM-80 criteria.

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What is the operating temperature range specification and what is the maximum junction temperature (Tj) of the LED lamps over that operating range?

The fixture operating range is -40C to +50C. The driver is rated down to -40C. Each fixture is designed then physically tested to confirm maximum LED temperatures.

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What is the expected L70 lifetime of your fixture? How did you calculate it?

The L70 lifetime rating for all Sternberg products is 70,000 hours. This is based on the normal operating maximum junction temperatures of the LED's. This temperature is compared to the IESNA LM-80 lifetime data supplied by Cree. Also, the rated life of the driver is considered.

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What are the delivered lumens and LPW of the fixture (Lamp and Driver)?

All Sternberg products are photometered to determine delivered LPW based on LM-79 test standard.

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Is the chromaticity of the fixture in the ANSI C78.377A color space and is it stable over time? How do you know?

The IESNA LM-79 testing confirms the 1910LEDRLM18-4A1R45T3 with a teardrop lens is within the ANSI C78.377A color space. The IESNA LM-80 testing provides color stability.

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What is the power factor of UNRIVALED™ fixtures? How much power does it consume in the "off" state?

The power factor of the fixture is greater than 0.9 as tested and consumes 0.0W in the off state.

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Have you applied for the DOE Energy Star for UNRIVALED™? Why/Why not?

No. The fixture has not yet been submitted since the Energy Star standard for outdoor SSL has not yet been released.

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Is UNRIVALED™ lead-free, mercury-free and RoHS compliant?

Yes. The fixture, LED boards, driver and components are all RoHS compliant containing no lead or mercury.

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What is your warranty and do you have the means to stand behind it?

The complete fixture is warranted for 7 years - effective on shipments after 5/01/10. Sternberg Lighting has been in business for over 80 years and has always stood behind its products.

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What constitutes a failure of the fixture?

Sternberg Lightings standard warranty conditions apply. In addition, the LED boards and systems shall be warranted, during the stated warranty period, against failures defined as more than three (3) simultaneous non-operating LED's.

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