Well, who fuckin' knows, because there's no PDF for it, really...
At the description it says
LED Bulbs
Beam Angle(°): 60°
Color: White
Certification: CCC
Length: 0.71m
Voltage: 12V
Number of LED Chip: 1 pcs
Shape: Other
Base Type: Other
1 chip (die) is obviously false for anything other than 3-4V, so we know one of these is wrong.
The other description below this says...
Features:
Brand new and high quality.
High power super bright LED light
Type: COB LED
Power: 4.8W
Voltage: 6~7V
Current: 500mA
Luminous Flux: about 320~340LM
Color Temperature: 2900-3200K
Emitting Color: Warm white
Long service life LED
Great for making light sources for video camera, fish tank, decoration light
COB LED is less thermal resistance:
Among different LED components such as high power LED, SMD, dip etc, COB LED is best in less thermal resistance and cooling.
Size: 5cm x 0.7cm - 1.97inch x 0.28inch
Package Included:
1 x 4.8W COB LED Light Warm White
Which is all kinds of more inconsistent. 6-7V at 500mA is 3-3.5W, not 4.8W.
So, take your pick.
There's no sign of onboard resistors, so they aren't going to take 12V-as-in-constant-voltage-power-supply.
Probably you can run them at 700mA (which would give around 4.8W), and whatever voltage they actually operate at, burn them out quickly, and buy more replacements when needed.
If you actually want good quality spectrum / CRI, reliable data and long lifetime, buy some legitimate brand name Cree or etc. parts. They'll be expensive, and you'll never have to replace them (assuming your thermal design is sufficient).
Tim