Wife:
ARC LSH-P, CMG Infinity Ultra-G in her purse and Photon II on her key-ring. She also has a Swis Army Allox knife, a Leatherman Micra and a Swiss Sprit multi-tool, a compass, matches and a lighter in her purse.
Around the house: Surefire L4, Purple MiniMag/BadBoy 500 R2H with Glow ring, 2 Dorcy 1LED AAA, Purple 2D MagLite modded to 3x123/KPR112, a yellow Eveready 2D modded to 3x123/KPR112. The light she grabs is the yellow Eveready 3x123.
She says it's easier to find in the dark.
She took two Element 1 watt Luxeon 3AAA and two Dorcy 1LED 1 AAA and spare batteries to leave in her desk at work. Also a spare Gerber Multi-tool and a first aid kit.
She has 1 Surefire G2 and a SC1, 1 MiniMag/MadMax Q3/Lithium AA's & 1 MiniMag with a Opalec NewBeam with Lithium AA's in her car. Also a first aid kit.
She might have more, but these are the one's that come to mind. Believe it or not, she is not into lights. She just wants to be prepared.
PS: she has two headlamps, A Streamlight Septor that she uses for quilting and a Petzal Zipka she uses for reading while in her sleeping bag.
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Daughter & Daughter-in-law both have:
ARC LSL-S, Photon II, Infinity Ultra-G, Dorcy 1LED AAA, Surefire G2 with SC1, MiniMag/Madmax Q3, MiniMag/Opalec NewBeam.