You can protect your lamps from each other without using sleeves with socks. Sleeves uses up too much space and they're too rigid. Socks are better since they hug the lamps and they ocupy less space. Better be new socks, as in from the store. (Why would ye put that nice rare old lamp inside a smelly sock???
) Tube Socks are better than the one that is bent a little. It's better if the lamp goes in nose first. The base will snag on the sock and won't go all the way in. (You could screw in the lamp in a fixture like a NEMA head or acorn type of fixture and put the sock on the lamps. (Same goes for taking them off.)
Sock Sizes for each lamp size:
Baby Size - For -15 size and less.
Kiddies Size - For -15 to -21.
Teen Size - For -21 to -28.
Michael Jordan Size - For -28 to -56.
As for lenght. Preferably socks that cover 1/2 way to knee.
Color - ye can color code in any way ye want for each type of lamps. (Like NEMA Tags for HIDs.)
This is preliminary. You can always experiment with them and see what is better. Socks are cheap so they aren't gonna hurt your wallet.