Seems to be a well made light bulb, and very low energy, not easily available in the shops, so delighted to find them on ebay. One reservation is that although they are supposed to be same wattage as incandescent type, I found them brighter !
Bought this Paul Russells R63 spot after trying a couple of other makes which failed. So far, so good. A nice warm light and the bulb does not run hot.
We have had halogen lights on a display unit for 12 years these LED replacement lamps give a whiter light ( they are warm light) than the halogen lamps they replaced but we are happy with the results.