A silicone-based pressure-sensitive adhesive composition comprising a polymerized product of a reaction mixture comprising: a) a silicone compound having at least two ethylenically unsaturated groups; b) a photoinitiator of Formula wherein each R 10 is an alkoxy, aryloxy, alkaryloxy, aralkyloxy, alkenoxy, or -N(R 13) 2; R 11 is a group of formula -(OR 14) p -OR 15 or a group of formula - -X-R 16; R 12 is a hydrogen, alkyl, aryl, aralkyl, alkaryl, a group of formula - OR 17, or a group of formula - N(R 18) 2; each R 13 is an alkyl or two adjacent R 13 groups are combined with the nitrogen to which they are both attached to form a first heterocyclic ring having 1 to 3 heteroatoms selected from nitrogen, oxygen, and sulfur, the first heterocyclic ring being saturated or unsaturated and optionally fused to one or more second rings that are carbocyclic or heterocyclic; each R 14 is an alkylene; R 15 is an alkyl; R 16 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; R 17 is an alkyl, aryl, aralkyl, or alkaryl; each R 18 is an alkyl, aryl, aralkyl, or alkaryl; X is oxy or -NR 19 -; R 19 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; and p is an integer equal to at least 0; and c) a silicone tackifying resin. a) a silicone compound having at least two ethylenically unsaturated groups; b) a photoinitiator of Formula wherein each R 10 is an alkoxy, aryloxy, alkaryloxy, aralkyloxy, alkenoxy, or -N(R 13) 2; R 11 is a group of formula -(OR 14) p -OR 15 or a group of formula - -X-R 16; R 12 is a hydrogen, alkyl, aryl, aralkyl, alkaryl, a group of formula - OR 17, or a group of formula - N(R 18) 2; each R 13 is an alkyl or two adjacent R 13 groups are combined with the nitrogen to which they are both attached to form a first heterocyclic ring having 1 to 3 heteroatoms selected from nitrogen, oxygen, and sulfur, the first heterocyclic ring being saturated or unsaturated and optionally fused to one or more second rings that are carbocyclic or heterocyclic; each R 14 is an alkylene; R 15 is an alkyl; R 16 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; R 17 is an alkyl, aryl, aralkyl, or alkaryl; each R 18 is an alkyl, aryl, aralkyl, or alkaryl; X is oxy or -NR 19 -; R 19 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; and p is an integer equal to at least 0; and each R 10 is an alkoxy, aryloxy, alkaryloxy, aralkyloxy, alkenoxy, or -N(R 13) 2; R 11 is a group of formula -(OR 14) p -OR 15 or a group of formula - -X-R 16; R 12 is a hydrogen, alkyl, aryl, aralkyl, alkaryl, a group of formula - OR 17, or a group of formula - N(R 18) 2; each R 13 is an alkyl or two adjacent R 13 groups are combined with the nitrogen to which they are both attached to form a first heterocyclic ring having 1 to 3 heteroatoms selected from nitrogen, oxygen, and sulfur, the first heterocyclic ring being saturated or unsaturated and optionally fused to one or more second rings that are carbocyclic or heterocyclic; each R 14 is an alkylene; R 15 is an alkyl; R 16 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; R 17 is an alkyl, aryl, aralkyl, or alkaryl; each R 18 is an alkyl, aryl, aralkyl, or alkaryl; X is oxy or -NR 19 -; R 19 is hydrogen, alkyl, aryl, aralkyl, or alkaryl; and p is an integer equal to at least 0; and c) a silicone tackifying resin.