This Solar Keyhole Light charges up from the sun (no really) and comes on for 15 seconds when it detects your pathetic inept attempts to insert key into lock late at night. In that regard it’s probably better than the other half opening the door with a solar powered scowl. $7.99.
Tired of fumbling in the dark, trying to find and fit your key in the door lock? Solar light fits right over the lock, helping you find and insert the correct key. No wiring required; light attaches with adhesive backing. Solar panels automatically charge the unit during the day.