Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Cycling Water Resistant 3 Modes Egg Lamp
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGOD1, AFfbG10, BGBFAFF2019, BGVDay10%off, BGAFF7OFF, BGAFF10OFF, bGhOnEy10, BGHSO1, BGdragonBoat, BGSS10%SW, BgoFErTaSchInA10, BgcLuBofErtA10, BGMUBB, BG10OFFAFF, BGwhielabel, BGBICYCLES, BG4d9120, 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Heart Shape Rear Bicycle Light? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).