Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (65.99 USD): BG11a171
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): ADMITAD2212, BG1dda6b, 2022ACTIESNL, BG00c906, Terence, BG1efeb0, MVC8SPRING, 8BGwbg2204, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Youpin LYMAX Wide Angle Screen Light Bar GJS-D009.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).