How far does it go?I need help with long lights..

About 100 meters

What is the EXACT measurement form one end of the mounting hole to the other end?

The EXACT measurement of this light bar without including the mounting screws is 508mm with 0.2 error.

What are the other 2 dimensions for: H x W? I have a 2015 F150 Platinum, with a small gap above the bumper. Thanks.

hi, thank you for your questions. All our single row slim light bars have a height(width) of 5.45cm and a depth of 8.28cm. you can refer to this data to see if this size fits your vehicle.