LED lamp within $15: Cree PK Philips

The Cree LED bulb series is available in three models on the market - 6 watts for $9.97, 450 lumens for 2700 K-- 9 watts for $13.97, 800 lumens for 5000K--9.5 watts for $13.97 and 800 lumens for 2700K. Philips has removed the shading adjustment in its design and lowered the price. The 10.5 watt 800 lumens is only $14.97.

Philips light design

Here, let's take a look at the interior design of the new light. Philips' luminaires use long-range phosphor technology. The warm white light that was introduced last December actually uses a white light as the inner core and a phosphor on the inner wall of the outer layer. Although the news said that the new 3000K lamp has been greatly improved, it still uses the same technology. Crawford explained that the new luminaire uses blue LED technology and its phosphor is applied to each illuminating unit. This is different from the popular practice of applying a phosphor to the inner wall of the second layer. That is to say, the phosphor-attached LED mold actually applies the phosphor to the inner wall of the first layer. The new technology will reduce a layer of light between the LED and the casing, which will inevitably save costs and provide illumination efficiency. However, does it maintain a technical advantage? The heat emitted by the LED light source causes the fluorescent material to gradually change color, and the outward shift of the fluorescent material is an important advantage. Crawford said that the thermal management technology developed by Philips engineers made it possible to apply the right phosphor to the light source. Philips placed the smeared phosphor at the end of the production sequence.

In discussing the market supply of Philips Lighting, Ed Crawford mentioned: “It is very important for us to build a vertically integrated company.” The company also expects to provide such LED products to other solid-state lighting manufacturers one day.

Cree Tower Light

Unlike Philips, CREE uses the concept of LED filaments, the term "filament" in the era of incandescent lamps is now increasingly popular in the solid-state lighting industry. At the recently held Lighting Strategy (SIL) conference, Intematix announced the small remote phosphor optics called the A-type filament. Similarly, MJ Jou, president of Epistar, said that its LED string design is called filament. Apparently, the filament quickly became a shorthand for the light-engine component of the LED retrofit bulb.

The cost of Cree bulbs is worth exploring. The internal use of 20 LEDs is divided into 10 component columns, while the XT-E LED small customers are priced at $1.50 and the large customers may be less than $1, so Cree's internal production costs will be Huge, its cost may account for more than half of the 60W equivalent lamp price. Silicone-coated glass casings and drivers (high-voltage LEDs will simplify driver design) add cost, and Cree promises a 10-year warranty, all of which indicates that Cree's profits are slim. The beneficiary is the customer. If the lamp is used frequently, it can be foreseen that the investment recovery period is about one year.