Here's a resource for comparing bike lights. https://www.bikelightdatabase.com/ They list several of the lights mentioned here as the best. I'm not sure that is true if you are willing to consider foreign sources, particularly China. Sometimes it's hard to get information on the lumen output by the lights but with a little persistence you can find that too. Obviously the greater the lumen output, the shorter the run time. However, there is an improved form of the LED called COB (chip-on-board) that gives more output at lower discharge rate. Here's an example of a 168 lumen USB rechargeable rear light that's comparable in cost to the Cygolite 30 lumen light: Ultra Bright Bike Light Blitzu Cyborg 168T USB Rechargeable Tail Light Red LED | eBay
$26 at a US seller. Of course, there are a lot of very inexpensive but bright lights you can buy directly from China like this 100 lumen USB rechargeable for $7.79 postpaid 3 Mode Red LED USB Rechargeable Bicycle Bike Rear Tail Light Safety Warning Lamp | eBay If you are into DIY lights, the possibilities are even better for a low cost very bright light. I'm working on that right now.