Case Study



In our ongoing effort to insure we’re providing the highest-performing high bays in the industry, Cireon and Cree conducted a study to compare the performance of products from the two recognized leaders in high-powered white LEDs, Cree and Philips.

Evaluation Process:

We asked Cree to recommend their highest-performing LEDs in the common single-wafer format; Cree recommended their XPE-HEW and XPG products. For the Philips product, we utilized LEDs from an existing production lot without notifying Philips that we’d be conducting this comparison.

Test Luminaires:

Cireon designed and developed circuit boards in accordance with design guidelines published by Cree to accommodate the LEDs they recommended. With the exception of circuit design, board materials and construction methods were identical.

With these boards, we built three luminaires, each containing a 48-LED array driven at 0.7A.

Using optics and power supplies from common lots of product, except for the LEDs themselves, the luminaires were as close to identical as we could build them. The three luminaires are identified as:

“Cree XP-E-HEW”: LED part number XPEHEW-L1-200-R4-G-01
“Cree XP-G”: LED part number XPGWHT-01-4CO-R3-0-02
“Philips Rebel ES”: LED part number LXML-PWC2-UWOR

Testing Note: LM-79 testing for all three luminaires was conducted by Cree, in a Cree laboratory.

Summary Test Results (actual results from Cree lab on following pages):

  Total Lumens Total Watts Efficacy (lm/W)
Cree XP-E-HEW 6247.5 109.2 57.2
Cree XP-G 6097.0 103.9 58.7
Philips Rebel ES 7675.9 110 69.8


Click for full test results