An LED light device includes track means with removable LED-units which clip-on anywhere along the length of the track means or which may be added-on from ends of the track means to form an LED fluorescent tube, LED light bar, LED bulb, LED PL lamp, or other LED Lamp sealed inside a protective means finish the light source so that it appears similar to a non-LED light source. The removable LED-units or LED-assemblies with built-in LED elements allow people to adjust the position of the LED-units or LED-assemblies to a desired location, position, or orientation in in three dimensional space and obtain the best illumination with a minimum number of LED elements and lower power consumption.