利用长时间曝光产生的作品，总是那么梦幻而唯美，来自摄影师Joseph Michael 与萤火虫们共同创造的视觉奇迹。
The exposures varied on the cave and how close I could get. 5 mins for the close ups. 30 mins or 1hr for some of the wider ones,” Michael explains on Facebook. There “was a bit of experimentation involved. Getting the ISO / f stop mix right. The blue light in some of the pics is a soft LED which is powered from my car battery / inverter combo.