This involves "E40 LED lamp heat sink corn would be better?" Problem, some manufacturers considered
That can not be generalized to assert that without a good heatsink cooling bad E40 LED light bulbs. On the plant at least for now
    Business, there are the words of the heat sink to reduce costs more easily, users to buy products such as low price will be more

Buy LED bulbs with heat sink.

Compared to incandescent bulbs, LED bulbs can significantly reduce the power consumption of corn. With the price
Drop and increase the brightness, the latest LED bulbs have entered people's daily lives. Especially the occurrence of East Japanese
After the earthquake, as a "saving" the means to buy more and more people LED bulbs. (At our company
The customers are a lot more than before. )

Sales from the shopping malls and other home appliances manufactured by the Japanese manufacturers LED bulbs (E26/E39 lamp mouth products)
Look, no heat sink with the simplicity of design of products is gradually increasing. Moreover, expansion of light with optical angle
Incandescent bulbs to the same level of product in the future is expected to increase.

South Korea, mainland China and Taiwan manufacturers produced LED bulb has to use large and heavy aluminum die-casting powder
Thermal film products to the mainstream. Recently, I had the honor dismantling of these foreign companies manufacturing LED light bulbs,
And Japanese firms (Toshiba Lighting) manufactured products were compared. Here's a brief introduction to
Next.
I thought Japan had the simplicity of style LED bulb is to reduce by eliminating the heat sink to
Costs, but now it is wrong. Aluminum die-casting heat sink is not because of how high the price of components.
On the contrary, if the heat sink eliminating the formation of high-temperature case, the internal resistance of power modules need to use
High heat components, so the overall cost will not fall. Lighting point of view from Toshiba, the LED components taken
High luminous efficiency with the COB (Chip On Board) products inhibit fever. It can be said, the Japanese system
Simple-type LED lamp made through the use of expensive components to improve the performance of industrial design.

And overseas E39/E40 LED bulbs are used attaches great importance to the construction of low cost. The specific form
Many designers are now rarely used in large-size LED chips. LED Bulb E40 LED bulb in the most cost
Components is high LED. Therefore, most foreign products LED chips by increasing the input power of each chop
To improve the brightness, while reducing the number of LED chips to reduce cost. The LED luminous efficiency will then
Down, the heat increases, so need to be equipped with high heat capacity of aluminum die-casting heat sink. Another
Moreover, since the small number of LED's, so the uniformity of light will fall.

The author uses thermal imaging to detect light LED light bulb under the shell surface temperature. Results
Results show that the heat sink with aluminum die-casting Samsung's 7.1W LED products (540lm) is 47 ℃,
Without heat sink, using a thin aluminum shell of 7.2W Toshiba Lighting Products (600lm) was as high as
61 ℃. Because of the design idea is different, so not simply say one is better, but this difference exists
It is a fact. Toshiba is no problem with lighting in the highest within the limits set by the shell surface
Temperature, thus to simplify the cooling device. E39 LED bulbs

So, this involves the "LED light bulb heat sink would be better" issue, I believe that
Can not be generalized to assert whether the heat sink is good or bad. The manufacturers at least for now, there are heat sinks
Then more likely to reduce costs and users to buy products such as low price will get more of the LED with heat sink
Bulb. But by this time to note the light emitting efficiency and uniformity issues. On the other hand, if the injection
Re-form design and light bulb efficiency, then, no new type of LED lamp heat sink is the best choice
Items. Personally, I think they can have heat sink, but would like to get is a cheap and light
Efficient LED bulbs.