while doing a runtime test on the Hand-Sun, i noticed in my peripheral vision, a slight fluctuation in the light from the HID,... is this normal? it's not extreme, or constant, just happens every now and then for a second or two. is there a way to eliminate this? the power and connections are rock solid, the lights indoors and not moving, no wind or thermal changes. just seems odd to me... perhaps its a natural occurrence of a new bulb? any ideas guys?