Novel LED packaging adds filaments to retro bulbs

Archipelago Lighting LED filament bulbs

I first saw these filament-type LED components in a candelabra-base bulb at the 2011 LightFair, and the company exhibiting it didn’t want me to take a photo of it. This year they were all over LightFair, although I’ve yet to see them for sale at a retail store in the US. (That will change: One lighting vendor […]

3-way LED bulb teardown and why you should consider them

Cree LED 3-way bulb pc boards

When Cree came out with their 3-way bulb a couple of weeks ago, I thought, big deal. They already make a 60W- and a 100W-equivalent LED bulb, so a 3-way just sort of smushes them all into the same bulb. But then I read how Cree said that it was the second most requested LED product, […]

Review: Philips InstantFit T8 LED lamp targets fluorescent ballasts

Spectral power density of Philips T8 14_5W LED lamp

Let’s take peek inside another recently-introduced LED T8 replacement lamp for fluorescent tubes: The Philips InstantFit lamp.  It produces 1500 lm from 14.5W, for an efficacy of 103 LPW. Its CRI is listed as 83, and it comes in a range of color temperatures, from 3000K to 5000K. It’s non-dimming. But that may not be […]

What’s inside the Cree T8 LED fluorescent-replacement lamp

Cree T8 linear LED heat sink and lock annot_400

After evaluating the performance of the new Cree T8 LED fluorescent replacement lamp it was time to take one apart to see how they are designed. A quick recap: The lamp uses 21W to produce 2100 lm of 90CRI light. As you may remember from the article, the lamp’s cross-section is oval rather than round.  Cree gave it rotatable end-cap plugs […]

Review: Hands-on with the Cree linear LED T8 fluorescent-replacement lamp

The Cree LED linear T8 lamp is slightly larger axially than the fluorescent T8 lamps

I recently got my hands on a couple of the new Cree linear LED T8 fluorescent-replacement lights. These lamps go into an existing fluorescent light fixture and run off of the fluorescent ballast. Cree says they are compatible with 90% of the existing fluorescent T8 fixtures, even dimmable ones. Why should we care about fluorescent […]

Cree debuts linear LED T8 fluorescent tube replacement lamp

Cree 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. 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 […]

Further price drops in store? Slimstyle LED bulb gets Energy Star-certified

Philips SlimStyle LED bulb pc board and heat sink

The Philips 800-lm Slimstyle bulb has earned Energy Star certification, making it eligible for utility rebates in most states. (With the exception of California, where state regulations’ require LED bulbs to have a CRI of at least 90 to be eligible for utility rebates; the Slimstyle has a CRI of 80.) The Slimstyle’s list price […]

Smart LED bulbs differ by wireless control and light color

The TCP connect system is white-only and can produce 800 lm.

Several new smart bulbs are scheduled to be introduced in June at Light Fair 2104 in Las Vegas. So while we wait, here’s a look at the smart bulb currently available. (See Table 1 below.) I’m defining a smart bulb as any light bulb that can be controlled by your phone, using some form of […]

World’s tiniest tear-down: Inside a Cree XB-G LED package

The Cree XB-G phosphor/lens with a tooth pick for scale.

While trying to get inside one of the Cree LED light bulbs, I came to bear quite a bit of pressure on the inner metal column that houses the Cree XB-G LEDs. Apparently the small pry-bar I was using pushed on the LED packages at an angle. (I’m not sure because I only noticed the damage […]

Inside the Cree LED bulb family – and what may be next

Cree LED bulbs SW TW

Cree’s consistency in using the same platform for all of its LED light bulbs allows us a unique peek inside of its engineering design process. We can see how its design has matured over time, and even make some guesses about what’s next. I took apart the first Cree LED light bulb, an 800-lm, 60W-replacement bulb, […]