Dear all, I'm new to this forum. I have saw various posts. LED come with MR16, GU10, PAR30 & PAR38. MR16 is usng two pin type and socket base is GU5.3. MR16 is driving at 12Vdc therefore it will need a LED driver. In layman term is called transformer. GU10, PAR30 & PAR38 does not requred any transformer due to direct AC. Currently i'm working at LEDs industrial, if anyone required any of the following: 1. Chameleon Strip / Board / Video board & Ribbon 2. Mini Down light & Down light LED 3. LED Tube to replace commercial florescent tube 4. LED Bar 5. Mini Flood & illuminator 6. MR Basic / Tripod & Galaxy 7. Ground LED 8. U Lamp (Waterproof type and can be used in pool) 9. Garden LED 10. Various range of controller and accessories 11. LED Display System 12. Indoor/Outdoor LED Video Screen We carry LEDs for MR16, GU10, PAR30 & PAR38 from taiwan. Or you can visit this website for more information. www.prime-light.com Thank you for your time. cheers!