high battery consumption

the lamp actually work perfectly.
I have 2 of these lamps in use.
Wardrobe and pantry.
On average, the lamps thus burn about 1 minute twice a day.
After no more than 2 to 3 months, the batteries are exhausted. (3xAAA)
On the LED bulbs can not lie, I suppose the motion sensor is the power-hungry.
Alternatively, should you use the simple LED lamps with pushbutton, this last at least 2 years (my experience value).
These bulbs cost only one-third.