Since this is my first Ball watch, I'm comparing it to 2 other Traser I got. And sorry for the red light in the longer exposure. It comes from my mains power switch.
Before the test:
0.5s exposure F2 at ISO 800:
1s exposure F2 at ISO 800:
4s exposure F2 at ISO 800:
I think the Ball blows the Traser out of the water in terms of lume. The EMII classic probably put out more light then the 2 trasers combined. :)
But unfortunately right after taking these pictures I found that my ball have a speck of debris stuck on the underside of the crystal. I took it to the Ball service center. Mr. Wan in Ball Asian promptly apologize and offer to send me a replacement as soon as their next shipment arrives on Monday. Overall I'm very impressed with their service. But I think Ball Switzerland could do better on their QC department.
I hope those who own more then one Ball watch can post some Ball to Ball lume shot. After all, the tritium dial and hands are one of Ball's unique selling point.