Just check coupons out (with price alert and history). You probably want to know what is the best price?
3x XPL V5, Maximum 2200 lm, IP67, Memory modeLow Mode: 7H, Package Contents: 1x B3 Bike Light, 1x Handlebars Mount, 1x Helmet Mount, 1x Head Strap, 1x Rubber Buckle, 1x English Instruction Manual
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for Zanflare B3 6000-6500K Bike LED Light? There we go.
Price records source(s): Gearbest
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)).