Universal motors have that name for a reason, they're brushed and comfortable with AC or DC. (things like hair driers, angle grinders, food processors, etc. If it's small and noisy as shit, it's probably a universal. Generally for short intermittent uses, as efficiency and life is poor). Induction motors won't work though, as they need AC.(eg. furnace fan motors, compressor motors in your fridge, etc).
Every LED light I've ever seen has a internal SMPS, it should likely be fine with DC. So will SMPS wallwarts (phone charger) and computer power supplies (well, in 230V countries, or ones with universal input. (older, mostly?) ones with 120/240 switch won't work, as it uses voltage doubler for primary voltage... which doesn't work on DC).