The LED took 27 days to deliver, which is not bad at all if you have no need for it instantly.
It came in a plastic bag, put in plastic-bubble protected letter.
The LED is perfectly functioning, the "warm white" description fits well as it is perfectly balanced.
It was soldered correctly, but the plate gets a bit hot. I recommend attaching a heatsink, just to prevent overheating.
I am very satisfied, if you try to buy such LEDs in Italy, they cost 6€ to 9€, which is a real theft.
Perfect quality for such a cheap price!
If you want to power it with 5 Volts, I recommend using a 3 Ohms power resistor in series to the LED. This will limit the current to 0.78 A and the voltage of the LED to 3,73 Volts, which is very close to nominal values. I still recommend to attach a heatsink!
very good product, strong light, 2 pcs light more than 9W energy-saving bulb (on the picture right is LED), 7 pcs with 20W switched constant current driver light like zhe "sun"! Inly one of ca. 20 ordered pcs was reverse soldered to alu-plate (plus on minus and minus on plus) but I always try the functionality of each LED so never mind...