IES Reports on CALIPER Study

Founded in 1906, the Illuminating Engineering Society (IES) is dedicated to "good" lighting. Members include manufacturers, lighting designers and architects, consultants, electrical/building contractors, distributors, wholesalers, those working for utility and energy services, and people in government and education.

The Illuminating Engineering Society (IES) reports on the Department of Energy's (DOE) CALiPER study, including the problems and benefits likely to be encountered as LED products replace linear fluorescent lamps.

Eighteen lighting designers and facility engineers compared 24 identical pairs of troffers in a simulated office space. Three of those pairs involved fluorescent benchmark troffers, and the rest were LED products.

Products were evaluated for photometric distribution, uniformity of light on the task surface and suitability of the light output for the task, as well as flicker, dimming performance, color quality, power quality, safety and certification issues, ease of installation, energy efficiency and life-cycle cost.

Study Conclusions:

While lighting quality is of some concern with the LED products, it's no more so than with the linear fluorescent lamps they're intended to replace.

LED-dedicated troffers can compete with (and beat) fluorescents in terms of efficacy.

LED replacement tubes and non-tube retrofit kits are as efficacious as their fluorescent counterparts, though there are concerns about color consistency, glare, dimming, flicker, installation issues and code approval.

For more information about the IES, please visit ies.org. To view a complete copy of the report click here.

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