This kit contains 50 High-Power LEDs in 5730 SMD package.
Typical forward voltage: 3.2V @ 100mA (recommended)
Maximum power rating: 500mW
Sufficient cooling is required if the power consumption exceeds 150mW. Therefore, the package has a pad in the center of its back, which is supposed to have a thermal connection to a copper area of > 1 cm2 for necessary heat dissipation.
The color is daylight white (cold white).