You could bind a proc on all deops and check it against the bot's own nick, and if it matches have it privmsg the bot/service "L". If you do not know much about tcl, I suggest you read (at least) the file tcl-commands.doc that can be found in your eggdrop's doc/ directory. This way it can tell L what channel it needs the op for, without having to set the need-op for each one. This might actually be faster in the time it takes to reop, but could have serious problems with large deop floods.