well, yas and no. A lux III driven at spec (1A) and drawing ,lets say 3.7v, would be pulling 3.7 Watts, and you can overdrive, I push mine to about 1.2A. But yas A luxI is roughly 1Watt, LuxIII about 3 Watts, and LuxV about 5Watts. Hope this helps. If im am wrong, please chime in and correct me.
Jeff