I returned to work after a half term holiday and the return to GMT which now requires the use of lights on my commute.
My front lights...Hope Vision 1 and a Blackburn Voyager
My rear lights...Lezyne's Femto and Micro Drive.
The Micro Drive is charged from a USB connector and the Femto takes two CR2032 batteries.
I carry spare AA and CR2032 batteries to keep my lights fantastic on trips.