I have unscrewed many light bulbs in my life. Most of the time, the light goes off. You find a replacement. Then you unscrew the old and screw in the new. Every once in a while the bulb will not easily unscrew. Sometimes, I have had to break the glass and used a needle nose pillars to unscrew it. Not with the new light bulb, it has great danger. The EPA says to be very careful with these things. In a year or three, a bulb may go out and not want to come out. Yipes!