Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (12.75 USD): BGAlerabatKL
(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
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): bGhOnEy10, BGSL0, BG20SST, BGBW152, BGdragonBoat, BGAFF10OFF, bgshOOp10, 13f142, BgcLuBofErtA10, 10%ForNewBW, BG4BW25, BGCuponation10, BGHOTSHOP15, BG53e9c8, BG4f6c6d
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for BlitzWolf BW-SL0 LED Selfie Ring Light.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).