I saw this lamp being advertised over on MTBReview. I don't own one myself but the ad says that it has 3 flash modes. I figure one of those is likely a slow flash. I wouldn't mind having one of those myself but really I have no need. My Gloworm lamp has a bright slow flash setting but it is so bright I only use it when really needed. Otherwise I have one of the small 70 lumen Performance Axiom mini-flashers which I find really quite bright and good enough to alert people to my presence when the sun starts to get low in the sky.