BuyAccessories via Amazon offers Prime members the Orksun Automatic LED Night Light 4-Pack
, model no. ORK-UNL-4, for $7.99
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.74.) That's tied with our April mention and the lowest total price we could find for this quantity by $36, outside of the price below. These lights each feature a 360° rotating head and photoelectric eye that turns the light on at dusk and off at dawn and purportedly costs only $0.25 per year to operate.
A close price: Savebyus via eBay
$8.79 with free shipping.