Aptoyu via Amazon offers its Aptoyu 10-LED Waterproof Wireless Motion-Sensor Solar Light 4-Pack [amazon.com]
for $21.99. Coupon code "WV6QAYLC
" cuts that to $16.99. With free shipping via Prime, that's around $23 less than what other third-party sellers are charging for this quantity. (At $4.25 per light, it's also the best per-unit price.) Features include ABS construction, a sensing range of 10- to 16.5-feet (with a 120-degree angle), and IP64-rated waterproofing. Deal ends December 31.