Church Tradition Story 2: Lightbulb Evangelism

I've heard that the Brethren in Christ commonly have "evangelistic services" at 7 PM each Sunday, which is curious, because the services aren't particularly evangelistic, they're just regular Sunday-night church services. Few remember why these services are called evangelistic. In the 1800's, when electricity and incandescent lights were bleeding-edge technology, many churches in this denomination paid dearly to have electric light bulbs installed in their sanctuaries. Then, they started having extra services after dark, so one could invite one's non-Christian friend, saying, "Why don't you come to church, to see the lightbulb?"