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On 23 Mar 2005 at 15:19, Per Lindgren wrote: > As a comparison, the Bilux low beams are 40 watt, H4 are 55. Measured at > 12 volts (which is the standard on bulbs), that is 6.67A on the Bilux > bulbs, 9.16A on the H4. The high beam filament is rated at 45 watt on > the Bilux lights, 60 watt on H4. That is an increase of 2.5A, up from > 7.5A on the Bilux to 10A on the H4. This means that you use as much as > 10A on the headlights alone, and a minimum of 9.16A. I have to drive > with headlights on all the time, it's the law here in Norway. Just as a check, I pulled down my Sylvania bulb catalog. It seems we are both wrong on the voltage, but you are closer: The design voltage for all the "12V" sealed beams is 12.8V. It's odd, but they specify that the lifetime hours rating is measured at 14V, but they don't specify where the watts are measured, so I would assume that it's measured at the 12.8V design voltage. More interesting is the fact that the old 6014 sealed beam is rated at 50/60 watts, while the modern H6017 is rated at 35/60 watts. H-4 seems to be a number that only the automotive industry uses. I don't find it in my bulb manufacturer's listing. > If you also use the Ebersp?cher to warm your interior, the generator is > starting to show it's limit. The gas heater has a 16A fuse, a 10A wont cut > it; it's too small. This means that the BN2 draw somewhere between 10 and 16 > ampere. I have no idea how much the wiper or the rear window heater pulls > from the system. Yes, the Eberspacher is the by far the biggest load on any of our cars. The rear window heater drew about 3 A when new, but by now most of them don't draw anything. ;-( -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~