Choosing an LED technology is like choosing the right winter coat to wear: there are different models that provide more or less features depending on what you might need. Once you decide the features you want from your LED, you can easily choose the package type accordingly. The "package type" refers to the way an LED’s semiconductor die similar to the filament in an incandescent is packaged inside LED devices for different applications. Shape: Round Power Source: Battery Powered Wattage (W): 3 Watts Length (IN): Not Applicable Width (IN): Not Applicable Mounting Length (IN): Not Applicable Includes Solar Panel: No Includes Charging Port: Yes Includes Mounting Hardware: Yes