HisGadget Inc. via Amazon offers the OxyLED Stick-On 4-LED Touch Light in White, model no. T-01, for $8.99. Add two to your cart (which would usually cost $17.98) and apply coupon code "VU57G68O" to cut it to $11.99. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.65.) That's the lowest total price we could find for this quantity by $3. (For further comparison, we saw a single light for $8 shipped last fall.) It features a 180° tilt function and two 3M adhesive pads. Each unit requires three AAA batteries (not included).
Note: You can also get three lights for $16.99 via code "6B3AFK3T" with free shipping for Prime members.