thank you for your query, thinking about the same so I used search and this post is the first one!

I found this stupidbright site, I have no financial interests... only looking for advice, at $47 looks good -not enough posting, mostly a lurker so here is the truncated site-

nightprovision dot com/collections/stupidbright/products/sb1-ver-2-0-cree-powered-900-lumen-complete-led-bike-light-set-with-sealed-8800mah-abs-polymer-battery-2-x-high-intensity-rear-lights