- LED WARM LIGHT BULBS WALMART DRIVER
- LED WARM LIGHT BULBS WALMART PATCH
- LED WARM LIGHT BULBS WALMART PC
Note that this metal base has no heat fins as is common in other LED bulbs such as the Cree and the Philips L-Prize bulbs.
LED WARM LIGHT BULBS WALMART PC
The importance of this metal plate is that it transfers the heat from the LEDs' pc board out to the round metal collar at the base of the bulb that radiates heat out to the ambient air. Thirty-eight LED components in plastic packages sit on a metal-core pc board, which is in turn mounted on a round metal plate. With the cover off, we can see the LEDs themselves and how the structure of a sno-cone design prevents omnidirectional light. The cover is plastic the external base below the cover is aluminum. So, Walmart, nice job on the sturdy bulb cover attachment.
LED WARM LIGHT BULBS WALMART DRIVER
This difficulty in getting the cover off is a good thing in general, because, like most other LED bulbs I've recently torn apart, the bulb has a non-isolated LED driver design, meaning that the AC grid power is exposed when the cover is off. This cover did not budge and required cutting to get it off.
5 shows why this light pattern is so difficult to achieve with a sno-cone design. A look under the Walmart bulb's sturdy plastic cover in Fig. The Energy Star definition of omnidirectional light is light that is evenly produced over 270° (☑35). (Note that spotlight beam patterns do have useful applications - for example, a can fixture in a tracklight.)Ī sno-cone design inherently has trouble producing light that goes down towards its base. (Read this post for more on how the ring works.)
LED WARM LIGHT BULBS WALMART PATCH
4 shows a crude approximation of how the light is distributed: The dark patch at the bottom should be almost completely lit.
This means that the bulb is not omnidirectional, like an incandescent light or even like a CFL. What about the light pattern? The bulb is a sno-cone design, meaning that the LEDs sit on a flat plate and project their light out like a spotlight or flashlight beam. I might be willing to cut the bulb some slack because there are a lot of dimmer switches out there…except that Walmart doesn't provide a list of dimmers that they have verified it works with. This is not good: Flashing and flickering are not acceptable in any lightbulb. (For a more detailed explanation of my dimming test, read the article here: "Walmart's sub-$10 LED bulb flickers and flashes".) You can see the flickering in this video. The bulb periodically flashed at certain brightness levels and also flickered. However, a subsequent test, with considerable time spent "hunting" for dimming anomalies, turned up some problems. How is the dimming performance? An initial quick run up and down the brightness level with a wall-mounted dimmer switch seemed to go okay. The "soft white" version is specified at 2700K, which seems pleasant and bright. The small print on the bulb's base says it consumes 10.5W, and my Kill A Watt meter says it consumes 9.3W and has a power factor of 0.93. The bulb's performance specifications say it produces 800 lm at 11W. 3, the bulb itself says, "NOT for use in totally enclosed luminaires." So which is it? 2 is another example of the bulb's confusing packaging: The package is marked, "Rated for indoor/outdoor enclosed light fixtures," while, as you can see in Fig. This can make for confusion both at the point of sale and once the bulb is at home and separated from its packaging.įig. The dimmable bulb has no marking indicating its dimmablility. The only marking on the bulb itself is on the non-dimmable version. The only marking on the packaging is on the lower corner of package's side panel.
1 is a side-by-side front view of the dimmable and non-dimmable versions of the bulb.Ĭan you see the difference? Me neither. This review looks at just the 60W-equivalent 800-lm versions, and primarily the dimmable.įig. The 800-lm dimmable costs $9.88 the non-dimmable version is $8.88. It comes in two levels of brightness: an 800-lm 60W equivalent and a 470-lm 40W equivalent, with each bulb available as either dimmable or non-dimmable. The bulb was reportedly designed and manufactured by Chinese lamp vendor TCP. So how does its new lamp perform, and what design decisions were made? As the nation's leading retailer whose name is synonymous with low prices, Walmart is one of the first places consumers look for household products like lightbulbs. Walmart made news recently with its announcement of a sub-$10 Great Value house-branded 60W-equivalent dimmable LED replacement bulb.
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