It is cheaper in GB than here in the US. The price on Amazon is $19.97 (plus shipping for us non-prime Amazonians) in the US and the lowest price on eBay is $22.27 with free shipping. The tail light in this set is a step above what came with my Blitzu Gator 320 light set. Here is a picture of the Gator 320 disassembled showing the Raypal (the real manufacturer in China) name and 1200 mAh battery inside. The tail light is operated by two CR2032 batteries. I can buy one like mine and have it shipped halfway around the world for $1.29 postpaid on eBay.
The lower part is the front of the Blitzu Gator 320 headlight
BTW, the Moon Meteor 300 lumen steady/400 lumen flash is still available in GB but the price is 40 GBP with shipping.
https://www.ebay.com/itm/300-400-Lum...LH_TitleDesc=0 The description for the Moon light is a lot more complete than what Blitzu offers. The only way to find out the battery size on a Blitzu light is to disassemble it, which I did.
The same light shows up multiple times on Aliexpress - take a look at the pictures for these. They are identical in appearanceSame light as the Moon 300 but with a helmet mount as well as handlebar mount $14.42 postpaid from China on Aliexpress
https://www.aliexpress.com/item/WEST...ceBeautifyAB=0same selection as Blitzu but different brand name $17.86 postpaid
https://www.aliexpress.com/item/USB-...ceBeautifyAB=0