Has anyone replaced their halogen headlamps with LED equivalent bulbs on a GS300? I have an 04 model (from new) and despite 180k miles it continues to run really well. Just one thing though, the headlamps are not bright enough especially on dip, hence the idea of replacements. The dealer (Lexus Poole) is not very helpful, it seems a fairly straightforward job to change the bulbs but there may be pitfalls. Advice would be really appreciated.