Somber tradition? At Chanukkah we light some candles, exchange gifts, eat greasy food and encourage our children to gamble to commemorate guerrilla warfare and oil lasting longer than expected.
It's not quite Purim (costumes and drunkenness to celebrate reverse genocide), Lag B'Omer (bonfires, instrumental jam sessions and haircuts to celebrate a break in a somber period) or Tu B'Av (unmarried girls in white dresses dancing to celebrate... well, nobody's really sure). But it's definitely not at the somber end of the Jewish festival spectrum.
Lighting one (or eight or nine) up doesn't seem all that inconsistent with the themes of Chanukkah. Although hash oil might be a more apropos choice of recreational pharmaceutical.