The Turn On lamp features a globe-shaped bulb that rests atop a metallic cylindrical base available in a choice of four finishes: black, silver, red and green.
By turning the column-shaped base of the lamp – described by the brand as "effortlessly simple" – users can gradually adjust the brightness of the bulb, or turn the light off.
The design is a development of Hoff's Switch Light graduation project, which was the recipient of the Hay Talent Award in 2014.
The Turn On lamp is on display as part of a wider exhibition at designjunction, in which the brand's entire lighting collection is brought together for the first time in one place.
The exhibition is on display until 27 September 2015 in the grand atrium space of designjunction's The College venue on Southampton Row, which is taking place as part of London Design Festival 2015.
"The idiosyncratic joy of London, the home of Wrong for Hay, is perfectly in evidence within the faded Victorian grandeur of the atrium space within The College building," the brand said in a statement.
"Vaulted ceilings and a glass dome roof provide the perfect setting for a celebratory exhibition of progressive and accessible design," they added.
The first 200 editions of the lamp will be available for visitors to purchase in the Wrong for Hay lighting kiosk in the space.
Wrong for Hay also launched a number of new pieces at last year's London Design Festival.