Recently got my E20 for work use (electrician). Always used my Streamlight Jr. LED for dimly lit areas when I've got to work in a j-box or do some hand-tracing or for peering into the innards of industrial service equipment. Can't use this thing as a replacement .. it's TOO bright, leaving my 62 yr.old eyes seeing stars later. It will see service strapped to the bars of my mountain bike.