The led lamp or built-in good external constant current driver
Good, external device is greater than the space without limit, you can do better, and the other heat dissipation is better, longer service life.
In terms of the whole lamp, a light source, a power supply are heating element, temperature rise overlay, if put together lead to the accelerated ageing of the LED light failure seriously affect the life
Built-in like to drive in a work of the oven, the outer is working in normal temperature, which long life are you talking about? But some environment: such as moisture, dust environment, have to consider the external, LED lamp bead every working environment temperature 10 ℃, life will be reduced by half.
