For anyone who has interest, Amazon has following TP-Link Kasa smart deals:
1. Kasa Smart Light Bulb KL130, LED Multicolor Smart Wi-Fi Alexa Bulbs Works with Alexa and Google Home, A19, 2.4Ghz, No Hub Required, 850LM RGB Color Changing (2500K-9000K), 9.5W $14.99 when you click $2 Coupon on the page
2. Kasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4Ghz Wi-Fi Light Switch Works with Alexa and Google Assistant, UL Certified, 1-Pack, White $14.99 when you click $2 coupon on the page