Word jumper is a Code Mirror plugin that allows you to jump to the word boundaries in camelCase and underscore_separated symbols with a simple keyboard shortcut (pmeta-alt-right/left by default) (https://github.com/ajile/word-jumper)
This is a plugin to enable that functionality within Light Table.
It uses a slightly modified version of ajile's aforementioned Code Mirror plugin, so props to him.
To change your keyboard shortcuts alter the :editor map in your user.keymap file as follows. This example uses ctrl instead of pmeta-alt.
{:+ {:editor {"ctrl-right" [(:editor.codemirror.command "wjright")]
"ctrl-left" [(:editor.codemirror.command "wjleft")]
"ctrl-shift-right" [(:editor.codemirror.command "wjsright")]
"ctrl-shift-left" [(:editor.codemirror.command "wjsleft")]}}}