Dancing Will-o-Wisp

You call upon 4 small floating flame spirits in the colors of Blue, Green, Red and Yellow, each glows with 5ft. of bright light and 10ft. of dim light. You can move them freely during your turn.
They move by blinking out in one spot, and appearing in another.
You may turn the spirits Invisible, but their light still shines.
You may also move them onto the same spot, allowing them to cast and become a single effect of Simple illusion at no cost.
At the start of your turn, you may freely move them around within range.