Read this it was posted in response to your question earlier if you haven't already seen or read it
https://www.lexusownersclub.co.uk/forum/topic/108747-what-to-look-out-for-lexus-is250-2007-model-year/?tab=comments#comment-962998
I am sure a few members here already have this fitted in their IS 250's not too sure about the RX though but would probably assume that there is one for it🤔
I would think you could have 2 brands as long as they are on the same axle,that is one brand on the front and another on the rear without too much bother
Car manufacturers have moved away from 2 fog lights and 2 reversing lights for ages now,its now the norm to find cars with one of each,although there are still a few with both 😀