$26.28 – Color Temperature: 4200K / 5000K / 6500K, 1046LM, 18650 Battery.
According to my DB the lowest price is $26.28 for Convoy H1 XML2 Headlamp (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($26.28)
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. Price? Well, this price is higher than average price ($23.14)
Link: Banggood product page
Price: $26.28
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGH1, EYBG, BGDLH1, eybg, BGTORCH, BGCH1, 502C6B, BG309d35, FIN1445, F03084, BGOutlight10, BG589b2e, BGd57765
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Convoy H1 XML2 Headlamp? There we go. The lowest price was: $18.28.
Price records source(s): Gearbest, 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)).