Burn times vary by model. Common listings show about 8 hours; some standard tealights list around 3 hours; and a jumbo/mega option is listed at about 9 hours.
Materials depend on the product: glass is used for clear votive cups, many tealight holders are plastic, and some tealights are sold without any container.
Listings mention paraffin wax, generic/white wax, and sustainable palm wax.
Wick details vary, but listings show single wicks made of lead-free cotton (often labeled 100% cotton lead-free).
Pack sizes vary widely. Examples include 6-piece packs for glass votive cups and multi-packs of 20, 25, 30, 48, or 96 tealights; at least one listing shows a single-piece quantity.
Most listings are labeled for indoor use. One listing specifies use in sheltered outdoor locations rather than fully exposed outdoor conditions.
Some glass votive cups include peg-bottom or rubber-peg designs to help hold candles securely on flat surfaces or when mounted in sconces.
The mega/oversized tealight is listed as 0.8" high with a 2.2" diameter. Packaging dimensions in the listing also show 2.2" width and depth.