Thomas D.wrote a review of NiteRider Solas 250 Tail Light on May 6, 2019
Familiarity: I've used it once or twice and have initial impressions
Very nice light, bright and flashes prominently. Unfortunately, using either flash mode the best length was 3 hours then the battery dies. Not acceptable. They quote 4.5 and 6.5 hours. Not in my case. Returning for a different type of light.