Facepalm Index Pt. 1 (Because I just know there will be more)
Customer: Hey, what's the difference between this light bulb and that one?
Me: Well, both are essentially the same bulb. They'll both work for the same applications. The only actual difference is that [higher quality brand name] is brighter.
Customer: Um... What does "Brighter" mean?
Me *rendered speechless for almost five whole seconds*
Me: Um... it's... Brighter. It... gives off more light...?
Customer: What does that mean?
Me *no idea what to say at this point*
Me: You can see stuff further, brighter, as if it was less dark...
Customer: I don't get it
Me *Facepalm*
Me: Just get the cheaper one, the extra brightness will just be wasted...Favorite Color
Customer: Which of these battery chargers is better?
Me: Well, they're actually completely identical. They've just switched the packaging. The red one is the old box, the blue one is the new box.
Customer: Okay, so which is better?
Me: They're exactly the same. There's no difference. Just a different colored box
Customer: Okay, so is the blue one better than the red?
Me: No, they're identical in absolutely every way
Customer: Right
Me *thinks the customer finally understands*
Customer: So which one should I get?
Me *not facepalming QUITE yet, I have a feeling it's still too early*
Me: Doesn't actually matter. They're made by the same company, they're the same product, just a different colored box that you'll be throwing out as soon as you bring the charger home anyway.
Customer: Okay, so which one is better
Me: ... Okay, what color do you prefer, red, or blue?
Customer: You're the expert, you tell me!
Me *Facepalm (though i'd later learn that it was STILL too early)*
Me: ...Okay, your favorite color is red, you should get the red one!
Customer *stares blankly at me, and then looks to another co-worker*
Customer: Hey, Which one of these battery chargers is better?
Other Co-Worker (who had heard the whole thing and was trying not to laugh): Oh, they're actually exactly the same, just a different box
Customer: Yeah, but which brand name is better?
Me and other co-worker *simultaneous facepalm*[This continues for about five more minutes]Footnote: that customer finally decided on the blue battery charger. Later on that day, he returned it and exchanged it for the red one. I wish I was making this up.