The Us Department Of Energy Doe Has Announced It Compl - USA

The latest Caliper report on LED flood lights has indicated that the

range of lumen output and available luminous intensity distributions

must expand to better match conventional flood lights.

The US Department of Energy (DOE) has announced it has completed Series 15 testing of a group of 10 LED flood lights.

The summary of the results has indicated there are several key areas in which LED flood lights should be improved to make them more competitive with conventional flood lights.

These include higher lumen output, narrower spot distributions and a wider range of accessories to allow customization.

The summary report is available at the DOE SSL website.

Lumen output vs.

efficacy

The 10 LED flood lights tested represent a broad range of conventional luminaires designated as flood lights.

As a result, performance varied greatly among the products.

The LED flood lights performed well in terms of efficacy but most did not match the lumen output of the benchmark metal-halide lamp.

CRI of the LED flood lights was in the range of typical metal-halide and CFL lamps, but the correlated color temperature (CCT) of several products exceeded that of conventional products (>5000K).

In terms of luminous intensity distribution, the majority of the LED flood lights had wide distributions.

Producing narrow spotlights with LED fixtures has proven difficult according to the report.

Jim Brodrick, the US DOE’s lighting program manager highlighted many findings from the tests in a recent SSL Postings.

In talking about flood lights, Brodrick said “the focus this time was floodlights - not an easy category to nail down, given its broad and ambiguously defined nature.

For that reason, drawing absolute conclusions regarding the performance of the 10 LED products tested in Series 15 (and compared with a benchmark conventional floodlight as well as data from an extensive review of manufacturer literature) would be inappropriate, as each could be effective for a given application.

” He added, however, that relative to competitive flood lights, including high-intensity discharge (high-pressure sodium or metal halide) or CFL, where outputs can exceed 20, 000 lm, only one LED flood light in the Caliper study reached 8000 lm.

Regarding customization through the use of modular lamps, reflectors and accessories, only some of the Series 15 flood lights offered this flexibility to specifiers.

In addition, four of the ten lamps tested had at least one manufacturer’s claim that proved false in Caliper testing.

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