What voltage do these run on & what power supply do you recommend?

Thank You for your enquiry. I can confirm the LEDDE1W4F850 run on 3 volts DC at 350ma, The dragon eye range is powered by constant current drivers below are the drivers we stock and recommend - LEDOTE13350PC. This can drive a min of 7 dragon eyes and a max of 11, Mains dimmable Osram driver LEDOTE18350PC. This can drive a min of 10 dragon eyes and a max of 16, Mains dimmable Osram driver LEDMDCCELED15. This can drive a min of 1 dragon eye and a max of 13, Mains dimmable EcoPac driver LEDMWLCM25. This can drive a min of 3 dragon eyes and a max of 16, 1-10V dimmable MeanWell driver LEDOTDALI151A0LT2. This can drive a min of 3 dragon eyes and a max of 16, DALI dimmable Osram driver