Depending on the type of number plate LED's you've got, you might be able to turn the bulb round. What I mean is, if you've got the ones where you replace the whole unit then this won't work, but if like mine you've just replaced the festoon bulbs then you can spin them round in the holder until the LED's are facing away from the clear plastic lense. I did this until I found an angle where the light wasn't too bright and looked more OEM.
I prefer it to look crisp and original rather than over the top.
There's an older 5 series BMW that I follow to work sometimes and his number plate lights are so bright that the reflection off the plate is actually dazzling. God knows what sort of bulbs he's got, but he certainly got his money's worth when he bought them though.