Cody H.wrote a review of Lezyne Laser Drive Tail Light on July 8, 2018
Familiarity: I've used it several times
Figured I'd put a few more dollars into a nice light. The product feels well-constructed with a bit of weight to it, and is definitely a lot bigger than I expected. The rubber strap is stiff at first, but after a few uses it loosens up. I took the light on a metric century and it lasted for the advertised four hours on the Day Flash 1 setting (with the lasers on). The lighting modes are great, especially the daytime light mode, and the lasers are clear after dusk. (I assume anything brighter would be blinding eyes, burning tracks onto the street, or causing forest fires.)
If you have a larger saddle bag (I use the Specialized Wedgie) and your seat post isn't raised so high, this light might not have any room on the seat post - but that was my fault and not the product's fault. I wrapped it around the uppermost part of the seat tube instead and it's still very visible.
Would definitely recommend for commuters as a main light, and definitely a good choice for road bikers who put safety first. Pleased with the purchase!