0 . ▁In ▁November ▁AA ▁Command ▁changed ▁this ▁to ▁clusters ▁of ▁three ▁lights ▁to ▁improve ▁ill um ination , ▁but ▁this ▁meant ▁that ▁the ▁clusters ▁had ▁to ▁be ▁spac ed ▁ ▁apart . ▁The ▁cluster ▁system ▁was ▁an ▁attempt ▁to ▁improve ▁the ▁ch ances ▁of ▁pick ing ▁up ▁enemy ▁bom bers ▁and ▁keeping ▁them ▁ill umin ated ▁for ▁eng agement ▁by ▁AA ▁guns ▁or ▁night ▁f igh ters . ▁Event ually , ▁one ▁light ▁in ▁each ▁cluster ▁was ▁to ▁be ▁equ ipped ▁with ▁Search light ▁Control ▁( S LC ) ▁rad ar ▁and ▁act ▁as ▁' master ▁light ', ▁but ▁the ▁rad ar ▁equipment ▁was ▁still ▁in ▁short ▁supply . ▁ ▁The ▁expansion ▁of ▁AA ▁def ences ▁meant ▁that ▁ 5 th ▁AA ▁Division ▁was ▁split ▁up ▁on ▁ 1 ▁November ▁ 1 9 4 0 , ▁with ▁ 4 6 ▁AA ▁B de ▁and ▁ 6 6 ▁S / L ▁R gt ▁coming ▁under ▁a ▁new ▁ 8 th ▁Anti - A ircraft ▁Division , ▁which ▁took ▁responsibility ▁for ▁the ▁City ▁of ▁Br istol ▁and ▁the ▁count ies ▁of ▁Som erset , ▁Dor set , ▁Dev on ▁and ▁Corn wall . ▁In ▁November ▁ 1 9 4 0 ▁the ▁regiment ▁sent ▁cadre ▁No ▁ 5 4 , ▁consisting ▁of ▁seven ▁officers ▁and ▁ 4 5 ▁other ▁ranks , ▁to ▁form ▁a ▁new ▁battery ▁at ▁ 2 3 2 nd ▁S / L ▁Training ▁R gt , ▁Dev izes . ▁ ▁Although ▁the ▁main ▁weight ▁of ▁the ▁Bl itz ▁fell ▁on ▁London ,