I am looking for the brightest bulb for my toyota granvia 1997 camper van (preferably LED)
Is there any out there who can help with this

Retrofitting something 20+ yrs. old can be a challenge. How about an LED light bar or LED spots, there are plenty of them available?

Have you tried your local auto parts store, or Google?

Unless its an ENTIRE led bulb assembly (housing included and built in) stick with the incandescent types. LED bulbs exist, but they work like crap because the focal points are wrong for them and you blind others and have less light where you need it.