Angel Eyes and Parking Lights

[jarance]

Originally posted by nikazwaa@May 26 2006, 04:19 PM
Can't a custom switch be made for the angels? Rather than being hooked up to the low beam?

Can but this would involve bring extra cables into the headlamps.

That why it is quite logical to tap the supply from the pilot lamp
of the high beam headlight.

 

[jarance]

Let me see how shall I put it..

For a normal battery, the rating is about 90AH (Amp Hour). That means it can maintained a load of 90 amp (when fully charged) for one hour before the battery is completely drained.

Assuming your battery is about 80% fully charged. That means you will have
about 72AH. (In most case this is true if your battery is old).

If you have your CCFL and parking light on, the consumption is about
50W. That means the current is about 50W/12V=4 Amp (Using Ohm Laws)

So, with a consumption of 4 Amp, the battery will be fully
discharged in 72/4=18 Hrs.

But take note the starter need about 11.5Volt in order to work properly.

I don't have the discharge curve of the battery with me so I cannot
determine the maximum time you can have the CCFL and parking
light ON before it rendered the battery useless for starting.

 

[valkryie]

Hi Jarance,

According to your calculation, the consumption of CCFL as a parking light is about 50W and the battery should be fully discharged in 18 hours so it can be deduced that two 55W halagoen main beam (110 W) should fully discharged the battery in 9 hours.

Do you really think the battery can light up the main beam for 9 hours? I reckon in about 3-4 hours I won't see any light at all.

Anyway if NKTOB can have his angel eyes light up for 7 hours without any problems then I should be in the safe region too.

 

[DanPromote]

The angel eyes only consume 6W total for 4 pcs ie. 3W for 2 pcs. not what jarance mentioned.

CCFL = Cold Cathod Fluorescent Light. It comsumes very little power and produces very little heat.

 

[jarance]

Originally posted by DanPromote@May 28 2006, 12:55 PM
The angel eyes only consume 6W total for 4 pcs ie. 3W for 2 pcs. not what jarance mentioned.

CCFL = Cold Cathod Fluorescent Light. It comsumes very little power and produces very little heat.

err... what about the inverter? I think that also consumed some power.

 

[jarance]

Originally posted by valkryie@May 28 2006, 11:26 AM
Hi Jarance,

According to your calculation, the consumption of CCFL as a parking light is about 50W and the battery should be fully discharged in 18 hours so it can be deduced that two 55W halagoen main beam (110 W) should fully discharged the battery in 9 hours.

Do you really think the battery can light up the main beam for 9 hours? I reckon in about 3-4 hours I won't see any light at all.

Anyway if NKTOB can have his angel eyes light up for 7 hours without any problems then I should be in the safe region too.

You are right. With 2 headlamp ON, you will not see any light in 3 to 4 hours.
However, this does not means that the battery is completely flat (0 VDC).

If you would check the battery terminals with a voltmeter, you would
most probably get about 4 to7 VDC (depend on the condition of the battery)
With 4 to 5 VDC available, you might or might not see the headlamp
light up. Even if it is light up, it will be very dimmed.

As I mentioned earlier, the starter need a very high current in order to
kick start the car. If you battery voltage is about 10 VDC, chances is that
you will only manage to crank your engine only once.. It you fail to start,
call BART Team for rescue.

 

[DanPromote]

Originally posted by jarance+May 29 2006, 08:18 AM-->QUOTE (jarance @ May 29 2006, 08:18 AM)

 

[chubby]

Guys...as far as i know from personal experience on my own car...putting on the angel eyes for parking should not be a problem as i always turn my parking lights on but the most that i have left them on is about 5 hours...no problemos!

Hope this answers the question

But dont quote me la...im just sharing what i know

"Chubby is n will not be liable for any battery drain or any parts getting damaged faulty

 

[vinson]

Same here...tried leaving it on for 3 hours plus...so far so good. Must be the good job done by Calvin Tan.

 

[chubby]

Vinson,

Hehehhe...waaaa CAlvin sure cannot sleep one tonite...