taking off the bumper will allow u to take off the headlights and to reach the plugs for bulbs easily so u can tap the wire to it (this way, u DONT cut off the socket). and if one of ur bulbs do go out u can just reach in there and put the factory bulb back on and use the stock socket.

Also it will allow u to hide the ballasts behind the fender adn all the other wirings. Taking the bumper off is really easy.

and u can aim it to what ur original level is. it wont blind others any way, unless its like aiming up to the sky.