Cree debuts linear LED T8 fluorescent tube replacement lamp

Cree has introduced a linear LED T8 replacement lamp for fluorescent tubes. The lamp  fits into almost any standard fluorescent tube light fixture, both dimmable and non-dimming, depending on the fixture.

Cree linear LED T8 fluorescent tube replacement lamp

The Cree four-foot T8 lamp delivers 2100 lumens of enhanced-spectrum 90 CRI light while consuming 21W for an efficacy of 100 lumens per Watt at the system level. Rather than the traditional round T8 tube style, the lamp has an oval-shaped profile that allows more uplight than usually found in 180-degree LED tube lights.

The lamp is available in neutral (3500K) or cool (4000K) color temperatures. It uses Cree’s TrueWhite technology, which mixes in light from red and unsaturated yellow LEDs to push up its CRI. Cree claims it’s compatible with more than 90 percent of existing fluorescent ballasts. The lamp will sell at $30 each, yielding a payback period of 3 years.

It comes with a 5-year warranty, which is better than the industry standard 3-year warranty, but less than the 10-year warranty Cree offers for its replacement bulbs, downlights, and troffers

Here’s the link to Cree’s documentation on the lamp, and here’s where you can find a distributor. (Since these are aimed at the commercial market, you won’t find them in Home Depot. Rats.)

Comments

  1. John Francini says:

    A couple of interesting things I noted about these lamps.

    a) The per-lamp output of 2100 lumens compares unfavorably with the typical 2800-3100-lumen output of T8 32-watt fluorescent lamps when new. An interesting chart and explanation is at .

    b) This appears to be the first mainstream LED retrofit that I’ve found that doesn’t require rewiring (to take the ballast out of the circuit). I wonder if the overall power usage would drop and/or brightness go up if the fixture was rewired, or even if the tubes would work if they didn’t find a ballast in the circuit?

  2. John Francini says:

    hmmm. WordPress seems to eat URLs in angle brackets. Let’s try it again: http://www.lrc.rpi.edu/programs/NLPIP/lightingAnswers/t8/02-t8-light-output.asp

  3. marc riel says:

    Many other LED lamps with a nominal t8 shape exist that are operable with an existing ballast. The elephant in the room is Philips, whose competing product has been on the market for a few months. Obviously the shortfall is that the fluorescent ballast becomes the weak link in the system and will likely have to be replaced within the life of the tubes…probably better to go with alternative solutions that replace the ballast.