Rochester, New York accounting firm of DeJoy, Knauf & Blood, LLP invited DOE’s GATEWAY program to evaluate its new lighting system at its offices. One of the firm’s founding partners, David DeJoy, is also co-founder and CEO of OLEDWorks, the only U.S.-based OLED manufacturer. However, Pacific Northwest National Laboratory who conducted the study helped ensured that DOE Gateway project was objective as possible.
TeamDKB’s new office is located in the heart of Downtown Rochester at Tower280 at Midtown. After moving from a 1980’s-vintage downtown office that they leased for 25 years, TeamDKB committed to an unconventional office organization philosophy. The accounting firm has few private offices, and those offices feature glass walls to encourage transparency and the sharing of daylight.
The report pointed out that the large number and variety of OLED and LED luminaires employed in these offices makes the unique installation well worth studying. The DOE just published the report online detailing the lighting and its performance.
OLED Panels Mostly Support Lighting from LEDs
The OLED panels played mostly a supporting role in lighting the office, while LEDs were used for most of the lighting except for the conference room and some of the offices which used OLEDs as the primary light source. The study looked primarily at the use of OLEDs in the office space.
Dedicated OLED drivers drove almost all of the OLED panels, except for two OLED panels with integral drivers that eliminate the bulk of a remote driver. The OLED luminaires are dimmable in almost all areas and show almost no flicker that would surpass the guidelines of the IEEE Standard P1789-2015 for either minimum or maximum output range of the dimmer.
During nine months that the OLED systems have been in operation, none of the OLED panels or OLED drivers have failed.
The report points out that the OLED luminaires have efficacies of just 21 to 58 lumens per watt (LPW) that are well below those of the LED products (which have efficacies of 80 to 90 LPW). However, the report claims that projected efficiencies for the next generation of OLED panels are expected to be in the range of 80–90 LPW.
The report indicated that the exposed OLED panels provide soft light with minimal-shadows. Furthermore, the report noted that the light from the OLEDs makes faces and expressions visible and increases room brightness providing light to vertical surfaces, which the more directional light of LEDs may do less. At the panel luminances used, this visual clarity is achieved without employees reporting glare. The field measurement values of the CRI for the OLED luminaires range from 79 to 91.
Feedback from employees indicates they find the lighting system ( with both LEDs and OLEDs) functional and enjoyable.