In T’s column 1 Piece, 10 Budgets, we share 10 versions of an item in a range of prices. This time, we’re looking at portable lamps, the kind that can be charged, unplugged and carried from room to room and, in some cases, outside. From fresh takes to classics that have recently gone cordless, here are the favorites of T’s design editor, Tom Delavan. Credit...Courtesy of the brand 1. Ikea, $20 This battery-powered lamp emits a rosy glow, and the top can be tilted to direct the light.