Amazon has dropped the price of Kasa Smart Light Bulbs (4-pack) to around $6 per bulb, giving you voice-controlled lighting in every room without adding a hub to your setup. The four-pack uses standard A19 bulbs with E26 bases capable of producing 16 million colors and a tunable white range from warm 2500K to cool 6500K. Each bulb pulls just 9 watts while producing 800 lumens, making it equivalent to a traditional 60-watt incandescent. The Kasa app handles all setup for the lightbulbs and users can control them directly from their phones. The bulbs also feature Auto White mode, which adjusts the color temperature as the day progresses.