http://www.metricmind.com/products/bosch-pa-66-gf-30/
http://www.metricmind.com/wp-content/uploads/2011/08/PAD.pdf
-found this chart.
If pump is 900l/h at 0,1bar, 12v dc, then it use around 6 watts
i hope that i will have enough to power some 8w h4 bulb then