Hi, bulbs turned up...the red versions off the e-bay link above worked ok but overall no real improvement in 'redness' over the red normal bulbs I have already. The big disappointment and it's what the utube videos suggested is their is hardly any difference in tail and stop function. A slight increase in brightness but wonder if someone tailgating at night would see!!!
The others which were cheap stop/tail just didn't work and taking them apart (one fell apart anyway) they were simply wired to each other so not 'dual circuit'.
looks like a 2 bulb approach (ie cob and bulb) is probably the only way to get a significant improvement.....don't mind the stock look but pinkness bugs me!!