Hello all, me again,
Still trying to get my head around my RRS 2010, when the auto- lights or the head lights are demanded manually they momentarily come on bright and then dip right down. Main beam isn’t included in this process. All of this happens in 1/2 second or less
Nothing in the book for this and was just waondering why? Main beam is perfect.

It’s a self test (BIT) as Xenon lights have to be self adjusting to compensate for the load and attitude of the vehicle. Some call it ‘The dance’. 2012 5.0 SC AB
Mods:
TPMS
Genuine LR DRLs
Remote Boot close from key fob
2016 Discovery 4 Mirrors AKA RRS2
2014 L405 Surround Camera retro fit (WIP)
2013 RRS Dual View Screen fit (Complete)
2016 LR4 RSE
2014 LR4 Homelink
2016 FFRR Electrochromatic Wing Mirror Glass

70 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

Thanks for clearing that up, happy now I know there isn't a fault.