LightInTheBox offers four USB Night Light Touch Switches for $1.99 plus 50 cents for shipping. That's the lowest price we could find by a buck. It features two colors.
Note: This item ships from China and may take two to five weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 99-cent fee. Also, the countdown timer on the product page does not reflect an actual expiration time and resets daily.
Consider this your roadmap to 50 U.S. travel destinations that belong on your vacationing bucket list.