You see a lot of these on Ebay France (Ampoule LED) and Ebay Germany (LED lamp).
I don't know how good these lamps are. It looks that undersized resistors are used, or cheap SMPS are used to supply the LED's with.
I made a couple of Blue Green LED night light lamps in my house, hall, garage which are handy to find your way around in the dark.
Just used an old discarded base from a compact fluro lamp. 4 x 1 watt 8.2 kOhm resistors, 1N4007 diode to limit the current flow through the LED's to about 12 mA's. 9 or 17 LED's of choice et voila !
No burn outs and have these going now for about the last year.
Will put a photo on the electrical galleria
Cheers, Raymond
