Front (NAS) marker lights: 5W or 10W

MonLand

Active member
Somehow, my various searches failed and, somehow, I also don’t trust the auto part stores anymore when it comes to the Defender.
front (not side) marker light went out. Pulled the bulb and went to part store. My bulb was a 5W. Part store computer and “book” points to a 10W. Who is right?
 
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