1 to attempt to open the box it's in but isn't strong enough as the weakest member of the pack
1 who drunkenly knocks open the box for the bulb to pop out

1 who says it should be a light saving bulb as the standard one looks too fat and lazy
1 who suggests they can spend lots of Dollars on it to improve it

1 who admires it saying it's the best place in the World to look at a light bulb
1 who says the light bulb should be left alone as it doesn't look well

1 shouting they should all calm down as the light bulb is getting worked up
1 to correct the others on the correct terminology suggesting they should call it a light 'source'

1 who would be happy to screw it in hard if only they weren't married
1 who screams hysterically 'it's not about the light bulb' !!!

1 who grabs the light bulb and runs to the Diary Room crying, saying 'it's only Day 3, it's too soon for us to change a light bulb'

1 to rush to volunteer, knowing the cameras will be on the bulb
1 to turn light bulb changing into an opportunity to mention how much they miss their kids
1 to hide away from the chaos and sit alone

Two.

1 to change the bulb.
1 to fake hyper ventilation when HM #1 stares down her top whilst changing it.