For extra energy saving applications. Low current LEDs need only 1-2mA to emitt light. This is a new and exciting possibility for every designer to keep the energy management as low as possible.
Even very usefull for applications that run on batteries or accumulators for long life- and light times of the whole application. Of corse low current LEDs are not as bright as ultrabright diodes but they serve their purpose very well at very good quality and price.
