These pictures were taken in A Chinese Restauraut along Nathan Road, they are using 12 K2 LED as an array for a lighting Modules. The illumination on top of th windows are in fact Top LED light bars. If you are not informed, you could not tell the difference, meaning that the LED is working quietly to save power and Electric Bill for you and at same time provide the same cold white lighting for you.
The Owner of the restaurant is smart as this will save thousand of dollars a day for you. And the investment return may take 2 years only.