couple of thoughts and question ran thru my mind while visiting several lighting shops. 1. regardless for downlight or hanburger light or some deco ceiling lights, most shop says can convert PLC to LED or vice versa. Q1: Meaning, can i just buy 1 light fitting and convert myself Q2: or when the shop says convert, is actually 2 type of fitting. but same price 2. As I have source to get all the electrical stuff, what i really need are the light casing. Q3: for PLC, what are the components needed? (Osram Bulb/Tube, Ballast. Starter? Bulb holder usually comes with the casing?) Q4: For LED, what are the components needed? I think the saving to DIY would probably be more for LED, since the price has been heavily speculated and marked-up. just thought of DIY the lights myself and learn something from this experience. if anyone has this experience or in this line can share?