electrical question about light bulbs

dragonhead08

New Member
what would happen if I took a single filament 3156 bulb and used it in place of the dual filament 3157 bulb in the front blinkers? I know that the 3156 has notches in it that are different but I could file them off to make em fit. I know this sounds like a crazy idea but I swear theres a legit reason for it. What are the negatives to trying this?
 

DClights

New Member
In my expericences with the question you are posing. one thing happened to a friend of mine he tried this and the filament got way to much power and both sides looked like they started to burn and when they met in the middle the line snapped. th other thing that could happen is the bulb might explode or nothing might happen
 

honeykeeper

New Member
[quote name='dragonhead08']what would happen if I took a single filament 3156 bulb and used it in place of the dual filament 3157 bulb in the front blinkers? I know that the 3156 has notches in it that are different but I could file them off to make em fit. I know this sounds like a crazy idea but I swear theres a legit reason for it. What are the negatives to trying this?[/quote]

Are you going to add a blinker light to your rear view mirrors? <img src='http://www.titanspot.com/Titan/public/style_emoticons/<#EMO_DIR#>/017.gif' class='bbc_emoticon' alt=':smt005' />

Somewhere I have a chart with all the bulbs and lumens and shapes....might be faster to find it on the internet than dig in all my files.

How many lumens are you decreasing in your turn signal lamp and will you be doing it in both front and rear lights?

Aftermarket LED bulb replacements are also an option and they don't burn-out like filament bulbs and make much less heat.

I would recommend the led replacements as they should never burnout and will make less heat...if your going to add another bulb to that circuit it wouldn't be an issue either with current draw since they use so much LESS!!!! They are an investment but pay-off in time.

http://www.spiderlite.com/index.html

There is probably a minimum lumen allowance for safety issues....that would be my first concern with what you mention.

The next concern would be a loose and unreliable connection.....turn signal indicator lights are a major safety need. <img src='http://www.titanspot.com/Titan/public/style_emoticons/<#EMO_DIR#>/018.gif' class='bbc_emoticon' alt=':smt019' /> <img src='http://www.titanspot.com/Titan/public/style_emoticons/<#EMO_DIR#>/003.gif' class='bbc_emoticon' alt=':smt005' />
 

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dragonhead08

New Member
I would keep the wattage the same. As far as I know the 3157 is 27w/5W. I'm looking to use a 3156 thats 27W. Now my question would be since LEDS are single filament they're only negative in a 3157 application is the overactive flasher. How would the single filament 3156 be different. To shed some light on my plans. I want to replace the blinkers with a yellow 3156 to act as psuedo foglights. The yellow would be legal as well as not reflect back in fog. Now my question is because its a single filament wouldnt the negative effect be similar to an LED bulb that still blinks but just really really fast? I dont know much about this, I'm just talking aout loud.
 

honeykeeper

New Member
[quote name='dragonhead08']I would keep the wattage the same. As far as I know the 3157 is 27w/5W. I'm looking to use a 3156 thats 27W. Now my question would be since LEDS are single filament they're only negative in a 3157 application is the overactive flasher. How would the single filament 3156 be different. To shed some light on my plans. I want to replace the blinkers with a yellow 3156 to act as psuedo foglights. The yellow would be legal as well as not reflect back in fog. Now my question is because its a single filament wouldnt the negative effect be similar to an LED bulb that still blinks but just really really fast? I dont know much about this, I'm just talking aout loud.[/quote]

I think the 3157 is 27/7 watts.

Since spiderlite markets their product even for use as turn signals I would ask them to confirm any "negative effect".with blinker applications

...I assume you mean lifespan?

All good questions for the experts at spiderlite.....ask them about warranty too....

Led's are now available in more colors...evevn yellow and with brighter lumens...like the Luxeon Star LED equivalent to 12-18 led's. Spiderlite will probably offer LED color choices soon...which might be better yet for you.

let us know what you find with them and good luck! <img src='http://www.titanspot.com/Titan/public/style_emoticons/<#EMO_DIR#>/003.gif' class='bbc_emoticon' alt=':smt002' />
 

QWIKWHIP

New Member
[quote name='dragonhead08']I would keep the wattage the same. As far as I know the 3157 is 27w/5W. I'm looking to use a 3156 thats 27W. Now my question would be since LEDS are single filament they're only negative in a 3157 application is the overactive flasher. How would the single filament 3156 be different. To shed some light on my plans. I want to replace the blinkers with a yellow 3156 to act as psuedo foglights. The yellow would be legal as well as not reflect back in fog. Now my question is because its a single filament wouldnt the negative effect be similar to an LED bulb that still blinks but just really really fast? I dont know much about this, I'm just talking aout loud.[/quote]



Hmmm, ok, I'm gonna talk out loud with you....



What if you just modify a 3157 to fit backwards?? You know bright for running and the blinker will still function normal, you just won't see it at 7w. One thing I would be concerned about though is the temp. The 27w side of the bulb is not designed to be on full time. I think you might find it will, like DC said, over heat and burn out or possibly explode.



Now here's more thinking out loud... What if you just modify the housing to accommodate a low wattage yellow fog light bulb and wire a separate switch? Just a though for ya there Mr. Hello Kitty.
 

dragonhead08

New Member
yes, the exploding part concerns me. If it was just a matter of burning out I'd be ok with that. I remember a company called Blazer use to make a 25watt 1156 bulb. It was WAY brighter then the standard 1156. The problem was that it would burn out somewhat regularly. It was a worthwhile tradeoff because my 1st gen integra had parking lights situated just right where I was able make my own cheap built in driving light using the 1156 bulb. I just wish I could get a definite answer on the exploding or burnout possibilities. Honey, I'm shying away from LED as unless your using an LUXEON or superflux the lighting is pretty lame. I found a review on the spiderlites on an LED forum. They noted that the design was pretty well done, but the LED's they use are pretty low quality. They had to save money somewhere. I beleive OSRAM is in the process of developing some DOT approved LED's. Those may be worth a look when they come out.
 
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