Agreed. Although LEDs are far more efficient than incandescent bulbs, they still produce a non-trivial amount of heat. Almost all useful LEDs have some form of heat sink (for a flashlight, it can be a substantial block of aluminum, for a through-hole LED, it is the leads). Without some sort of a solid, heat-distributing backing, I cannot figure out what they would do with the heat produced by these.
As an example, I have a big-ass LED flashlight (google trustfire tr-j20). It gets extremely hot to the touch, and it has a massive heat sink.
Comments
Agreed. Although LEDs are far more efficient than incandescent bulbs, they still produce a non-trivial amount of heat. Almost all useful LEDs have some form of heat sink (for a flashlight, it can be a substantial block of aluminum, for a through-hole LED, it is the leads). Without some sort of a solid, heat-distributing backing, I cannot figure out what they would do with the heat produced by these.
As an example, I have a big-ass LED flashlight (google trustfire tr-j20). It gets extremely hot to the touch, and it has a massive heat sink.