Regardless of what you think of Bud Light beer, the 1980s series of commercials to introduce the product were excellent.
Lite beer from Miller was one of the few light beers available back then. So, ‘I’ll have a lite’ was the common way to order the beer.
So, when Budweiser decided to introduce Bud Light, they had to find a way to differentiate their product from just a light beer. Especially when many drinkers honestly didn’t care. They rolled out a series of commercials featuring someone in a bar saying ‘Gimme a light.’ They’d then receive some sort of lamp rather than a beer and immediately correct themselves to order Bud Light.
Here’s one example, there’s plenty on YouTube. Bud Light "Gimme a Light" Commercial 1 (1986) - YouTube