TP-Link Kasa Smart KL-series Wi-Fi light bulb review: Three new smart bulbs offer mostly great results

TP-Link has given its Kasa Smart Wi-Fi light bulb line a significant upgrade. The old LB series has given way to the new KL series, which dramatically upgrades the design of the bulb (for better or for worse) while leaving the core operational features intact. The Kasa KL series is available in three versions: a color-tunable