At 24" height light spread is 6'. It is a punctual light source however and light levels drop off considerably at the outer edges. That's the nature of the beast. I unfortunately do not have any light intensity readings to give. I'm just going on my visual impressions.
Cool, I'm just curious. Never seen anything like it. Is this like a complete florescent replacement or more of an accent light? I can see some really neat "sunlight" effects being possible. Pretty cool looking.