We recently had a large steam leak on a manway that required cordoning off the whole hall way. At 25' you could visibly see large quantities of steam blasting away. With out FLIR long wave camera I could see very little disturbance in the image. For the most part the plume was transperent...
I just ordered my DVD.
When performing our 4KV bus surveys we use some flash gear that is very cumbersome and hot but probably very safe. It has a rating of 65 Cal/cm squared. It seems good enough to walk on the sun with. [bigglasses]