FORBES - Oct 14 - Lumen is a Tinder-like dating app aimed at the over-50 demographic. Lumen users are able to start a limited number of conversations every day, in order to cut down on spammy behavior. Messages also disappear after 72 hours if there is no reply. This puts the focus on quality conversation. Every user must have at least one image of themselves and upon sign-up every user is photo-verified. The minimum icebreaker message must be at least 50 characters. The average user age is 56. The gender ratio is ~50/50. There is also a premium version that allows for more conversations per day and seeing which members have saved the user as a favorite and enhanced search.