Lee Filters 4x4" Black and White Polyester Filter Set ( Yellow #8, Yellow/Green #11, Orange #21, Light Red #23A) Yellow #8 - Yellow/Green #11 - Orange #21 - Light Red #23A 4x4 Filters Yellow # 8 requires approx. +1/3 stop of exposure. Yellow/Green #11 +1 2/3 stops. Orange #21 +1 stop. Light Red #23a +2 stops.