Jason,
The wound strings on electric are usually nickel which have significantly less tension than the same gauge bronze acoustic wound strings. Also most electric strings have an unwound smaller third string. Add it all up and electric mediums have approx 45 lbs less total tension than acoustic lights (standard tuning, 25.5" scale neck). That's a lot, over 25% less tension. Check out D'addario's (
http://www.daddario.com ) website to compare tension, string by string to see how much difference there is between the electric mediums and acoustic lights.
GL