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35w to 55w

Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=96324
Printed Date: July 16, 2025 at 2:54 AM


Topic: 35w to 55w

Posted By: blkb7
Subject: 35w to 55w
Date Posted: August 11, 2007 at 11:46 AM

i'm trying to kill the dead bulb light in my cluster from my hid fogs

i need to trick it by having the output to 55w instead of 35w, is there anyway to do this

thanks



Replies:

Posted By: Ween
Date Posted: August 12, 2007 at 9:49 PM

hi,

you'll need to read up a bit on Ohm's law..but here's the basics

20 w @ 14 v = 10 ohms (close enough),

so you need to add a 10 ohm resistor in parallel with the input side of your ballasts.

the power value of the resistor must be taken into consideration also.  a 20 w resistor may well work but for a safety factor, you'd increase the value to 50 w.

20 w is a significant amount of power / heat to dissipate (think about a small soldering iron), so you'll also need a heat sink to remove the heat into the air.  if you can mount the resistors/ heat sinks where air is flowing across them, it would definitely be desirable

hope this helps

mark


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