A polycarbonate blend composition comprising: (a) a first polycarbonate having a glass transition temperature of greater than 170°C as measured using a differential scanning calorimetry method, wherein the first polycarbonate comprises carbonate units derived from at least one of 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane(Bisphenol-AP), 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC); or the first polycarbonate comprises aromatic ester units derived from isophthalic acid or terephthalic acids or isophthalic acid esters or terephthalic esters or a combination of isophthalic acid or terephthalic acids or isophthalic acid esters or terephthalic acid esters and (b) a second polycarbonate wherein the second polycarbonate is a polysiloxane block copolymer derived from a polycarbonate structural unit derived from bisphenol A and a polysiloxane structural unit derived from (i) the structure wherein the average value of E is between 20 and 75; or (ii) the structure wherein the average value of E is between 20 and 75; wherein the blend composition has a glass transition temperature (Tg) between 148°C and 155°C as measured using a differential scanning calorimetry method; wherein the blend composition has a percent (%) haze of less than 3.5% and a % transmission of greater than 80% as measured using a method of ASTM D 1003-07 3.2 mm (0.125 inches) in part thickness; wherein the blend composition possesses 80% or greater ductility in a notched izod test at -20°C at a thickness of 3.2 mm (0.125 inches) according to ASTM D 256-10; and wherein the second polycarbonate comprises greater than 75 wt% of the polycarbonate blend composition and wherein the first polycarbonate comprises less than 25 wt% of the polycarbonate blend composition based on the sum of the first and second polycarbonate being equal to 100%. (a) a first polycarbonate having a glass transition temperature of greater than 170°C as measured using a differential scanning calorimetry method, wherein the first polycarbonate comprises carbonate units derived from at least one of 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane(Bisphenol-AP), 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl-cyclohexane (Bisphenol-TMC); or the first polycarbonate comprises aromatic ester units derived from isophthalic acid or terephthalic acids or isophthalic acid esters or terephthalic esters or a combination of isophthalic acid or terephthalic acids or isophthalic acid esters or terephthalic acid esters and (b) a second polycarbonate wherein the second polycarbonate is a polysiloxane block copolymer derived from a polycarbonate structural unit derived from bisphenol A and a polysiloxane structural unit derived from (i) the structure wherein the average value of E is between 20 and 75; or (ii) the structure wherein the average value of E is between 20 and 75; wherein the blend composition has a glass transition temperature (Tg) between 148°C and 155°C as measured using a differential scanning calorimetry method; wherein the blend composition has a percent (%) haze of less than 3.5% and a % transmission of greater than 80% as measured using a method of ASTM D 1003-07 3.2 mm (0.125 inches) in part thickness; wherein the blend composition possesses 80% or greater ductility in a notched izod test at -20°C at a thickness of 3.2 mm (0.125 inches) according to ASTM D 256-10; and wherein the second polycarbonate comprises greater than 75 wt% of the polycarbonate blend composition and wherein the first polycarbonate comprises less than 25 wt% of the polycarbonate blend composition based on the sum of the first and second polycarbonate being equal to 100%. (i) the structure wherein the average value of E is between 20 and 75; or (ii) the structure wherein the average value of E is between 20 and 75; wherein the blend composition has a glass transition temperature (Tg) between 148°C and 155°C as measured using a differential scanning calorimetry method; wherein the blend composition has a percent (%) haze of less than 3.5% and a % transmission of greater than 80% as measured using a method of ASTM D 1003-07 3.2 mm (0.125 inches) in part thickness; wherein the blend composition possesses 80% or greater ductility in a notched izod test at -20°C at a thickness of 3.2 mm (0.125 inches) according to ASTM D 256-10; and wherein the second polycarbonate comprises greater than 75 wt% of the polycarbonate blend composition and wherein the first polycarbonate comprises less than 25 wt% of the polycarbonate blend composition based on the sum of the first and second polycarbonate being equal to 100%. wherein the average value of E is between 20 and 75; wherein the blend composition has a glass transition temperature (Tg) between 148°C and 155°C as measured using a differential scanning calorimetry method; wherein the blend composition has a percent (%) haze of less than 3.5% and a % transmission of greater than 80% as measured using a method of ASTM D 1003-07 3.2 mm (0.125 inches) in part thickness; wherein the blend composition possesses 80% or greater ductility in a notched izod test at -20°C at a thickness of 3.2 mm (0.125 inches) according to ASTM D 256-10; and wherein the second polycarbonate comprises greater than 75 wt% of the polycarbonate blend composition and wherein the first polycarbonate comprises less than 25 wt% of the polycarbonate blend composition based on the sum of the first and second polycarbonate being equal to 100%.