Posted on 2017-04-18 10:07:36
The Design Lights Consortium® Qualified Products List, or DLC QPL, is a qualification program created and administered by the nonprofit Northeast Energy Efficiency Partnerships (NEEP), whereby approved lights must pass certain energy efficacy criteria in addition to color, thermal and total flux requirements. For instance, the measured lumens per watt (efficacy) must be at a certain ratio. While the DLC was launched nearly 20 years ago, the DLC QPL began in 2008 and took off in 2009. By creating assurances for energy efficient standards for general lighting, the DLC QPL has been adopted by more than 80 energy efficiency programs through electrical utilities in North America.Read More
Posted on 2017-03-08 13:36:22
If you’ve purchased our internal drive line voltage powered T8 tubes in the past, you know that we ship them with a pair of unshunted tombstones. But why can’t the tubes use the tombstones already installed with the fluorescent ballasts? More likely than not, those tombstones already in the troffers and fixtures are shunted. The difference between a shunted and non-shunted/unshunted tombstone is that the metal contact inside the shunted socket is one solid piece, giving it continuity if measured. Unshunted tombstones, on the other hand, have separate contacts for each pin, and were developed much later as fluorescent ballast technology advanced.Read More
Posted on 2017-01-22 11:20:51
How are Lumens Measured?
Lumens are typically measured at the source, the bare lamp level. But this does not accurately account for a “real-life” scenario of the lumens. There could be environmental factors such as weather or heat which impact the lumens in the real world, or even the type of fixture the lamp is installed in. Diffuser or protective covers can block 20% of the light from being transmitted to the target destination.Read More