Hey....my first post here....GREAT INFORMATION you all have provided.
Thought I would share what I found out when I went to buy my two lights.
Found all the parts I needed and went to pay for them....AS I WAS CHECKING OUT....the parts guy looks at me and says...
"You can buy these work lights with the 4509 bulb already installed and save some money...." I say WHAT...???!!!
NAPA PART NUMBER 80374
Sure enough, same work light for $11.99 + tax and the same bulb as I was buying separately for $18.69 + tax, you can buy entire assembled light (same rubber housing) for $23.49 + tax...Saved $15.57 and the time it would have taken to change out the bulbs.
Look forward to getting these installed....on my boat