I wondered what is the difference between Cool White and Standard Cool White

Very nice!

Back in the 50s, Standard Cool White or STD Cool White was used to differentiate between a Cool White and Deluxe Cool White. This also applies to Warm White and Deluxe Warm White. By the late 50s, that designation was gone. That STD lamp is the prize of the bunch. It is from 1955. All of the other GEs are from 1966 except one. The GE on the right (bottom) is from 1964. The non Lifeline Sylvanias are from 1961 and the Sylvania Lifelines are from 1963. All great finds!!

Look at the Lifelines cool cool

Back in the 50s, Standard Cool White or STD Cool White was used to differentiate between a Cool White and Deluxe Cool White. This also applies to Warm White and Deluxe Warm White. By the late 50s, that designation was gone. That STD lamp is the prize of the bunch. It is from 1955. All of the other GEs are from 1966 except one. The GE on the right (bottom) is from 1964. The non Lifeline Sylvanias are from 1961 and the Sylvania Lifelines are from 1963. All great finds!!

Thanks for the info. This was a great find with so many vintage bulbs.