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    VWVortex


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    Thread: P21W alternatives

    1. 08-15-2006 01:11 PM #1
      Of course, a lot of people (including myself) use 1156 as the alternative. There is another alternative, 3497.

      Quick specs:

      P21W
      Watts: 21
      Lumens: 465.09
      Life: 150 hours

      1156
      Watts: 27
      Lumens: 402.24
      Life: 1200 hours

      3497
      Watts: 27
      Lumens: 565.65
      Life: 600 hours

      Result?
      1156 are dimmer then P21W, but have substancial more life
      3497 are brighter than P21W, 4x more life, but costs me $9 for a twin pack.


    2. Member
      Join Date
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      08-15-2006 02:44 PM #2
      Since you have a Golf, do the 5th brake light mod and get even more light.
      That that is, is. That that is not, is not.

    3. 08-15-2006 11:36 PM #3
      1156 is a great alternative, excpet it is slightly longer and will "bottom out" in some tail light units, IOW the glass hits the front of the lens before the back plate snaps in place. If there's room, use the 1156.

    4. 08-17-2006 07:35 AM #4
      Quote, originally posted by GT17V »

      Quick specs:

      P21W
      Watts: 21
      Lumens: 465.09
      Life: 150 hours

      1156
      Watts: 27
      Lumens: 402.24
      Life: 1200 hours

      3497
      Watts: 27
      Lumens: 565.65
      Life: 600 hours


      Are all these ratings at the same voltage?

    5. 08-17-2006 07:43 AM #5
      12V for P21W
      12.8 for the rest

    6. 08-18-2006 07:50 AM #6
      Not much of a comparison if the ratings are at different voltages - power, light output, and service life will all vary with voltage.

    7. 08-18-2006 08:02 AM #7
      If you're assuming everything is linear... bump up the voltage to by .8, P21W will still not as bright (estimated 494 lumens) and will have even less life

      Of course, if you ask the beloved Daniel Stern what he recommends for MKIV tail lights..... He'll tell you:

      Brake & Turn = go with 3497 instead of P21W
      Reverse = 796 (which is a 35W Halogen) instead of P21W


    8. Member rains's Avatar
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      04-28-2012 05:19 PM #8
      thanks for this
      Quote Originally Posted by VadGTI View Post
      This thread is now about car cakes.
      Quote Originally Posted by Cousin Eddie View Post
      Things I learned today: You don't have to pass grade 12 English to Manage a Honda dealership.

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