Parasitic Drain - Bulb Trick
 

Just wanted to ask:

Is the "light bulb" test (putting a 12v bulb in series with the battery
circuit) an accurate test for a parasitic drain? My ammeter only goes
up to 0.25A, and I don't want to risk overloading the meter.

How bright should the bulb light up, if it should at all, for a
"normal" drain? (clock, ECU, radio memory)

Thanks!