We're commissioning a new logo for our 15th anniversary of http://www.heartlight.org. I've attached a copy of previous logos we've used as well as our current one.
Traditionally we have tried to incorporate both a "heart" and the idea of "light", though that's not required.
Icons to refrain from using include crosses, doves, and other Christians symbols such as the ichthus.
Also, the text used should be "Heartlight" (one word) and refrain from using the "Inc." of our name.
The website's wrapper will receive an overhaul, so feel free to reference the current look, but know that this logo will help shape the rest of the website's revamped design for our 15th year. It's long overdue for an updated look.
I'm happy to answer any questions and will provide feedback along the way. Thanks!