i've been using them for about three seasons,they use the same bulb as the lightforce aswell.
when i'm looking for quarry i use the blitz then when i've spotted something i use the tracer as the extra bit of spread is very handy for land driving,giving me a wider field of view (dogs coming into the beam,getting to close to the car,dykes, ditches etc).
i dont know about the battery drain though because i only use them in the car so it's just plugged into the cigarette lighter socket,but i have noticed that they go through bulbs a bit quicker than the lightforce,and you have to take all the sc