Go down and check coupons out. Remember to check price history if it is available. Best price?
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):
Weight 126g, Reverse polarity protection Yes, Material Aluminum Alloy, Lens type Ar-coated glass, Mode memory Yes, Diameter(Head/Body) 34.6 / 27.4 mm, Tailstand Yes, Battery included No, Driver 4 modes 0.1%-3%-30%-100% / 12 groups max current output 6000mA / Temperature protection management inside, Reflector smooth, Brand CONVOY, LED luminus SST40 with DTP copper plate, Low voltage warning Yes, Length 134 mm, Required battery quantity 1pcs, Required battery type unprotected 21700
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($34.55): BGAlerabatI
2. ($35.33): BGtorch2
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): FIN67615, BGCONV, F46294, BGflashlight, BG10OFFAFF1, BANGGOODSD, BGTorch4, 00c906, BGtorch3
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Convoy S16 SST40 20W Flashlight.
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)).