Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (13.69 USD): bGhOnEy10
Coupon (13.69 USD): BGdragonBoat
Coupon (13.69 USD): BGLIGHT0920
Coupon (14.21 USD): 13f142
Coupon (14.21 USD): bgshOOp10
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): DPT258, TTxBG10, BGss8%hl, bgssaff9, AFfbG10, BGNOVLED, BGVDay10%off, BGLIGHT2020, BGSS10%SW
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for ARILUX SL-WB 01 E27 7W RGBW Smart LED Bulb? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).