The light bar works, no idea how mudh light it puts out or if it ever gets used.
Will people on 20"s bottom out? probably not. Will you, on 17"s, ever bottom out? Probably not. I have, and you are all missing out
Will it get stuck? Yes. If you air down 35s on 17" rims, the tire will offer more give, and 'flatten' out more without losing too much sidewall. Let 15psi out of 20"s you are riding on rims.
winch