"Federal Signal Viper S2" knockoff

Discussion in 'User Submitted Equipment Reviews' started by vonirkinshtine, Apr 13, 2017.

  1. vonirkinshtine

    vonirkinshtine Site Regular

    I saw one of these things are a regional training event, and I thought it was pretty bright. So, I wandered down into the bowels of ebay and bought the cheapest one I could find. On the listing, it never mentioned "Federal Signal". The description was "16 LED warning light". I think one of the pictures in the listing showed a FedSig label. I figured they just used a picture from FedSig's website. I paid a whopping $18.

    After a couple of weeks shipping from China, the following is what I got.

    Packaging: LOL yeah, right.

    In the box: 1 warning light, 1 flashback shield, 1 mounting bracket, 3 suction cups.
    [Broken External Image]:http://[URL=http://s1148.photobucke... firefighting/20170413_151615_zpsogwozbax.jpg

    Close up of LEDs: Solder joints look good enough. The diodes don't look that great. A lot of surface imperfections on the lenses.

    I have it running on a lab power supply right now. I'll turn it off for the long weekend. But when I get back to work next week, I'll let it run for a full day and see how it does.

    Initial impressions are that it is friggin' bright! Video to come soon.
    Last edited: Apr 18, 2017
  2. PanHandleStan

    PanHandleStan Silver Level Member

    i just saw this one on Facebook

    Attached Files:

  3. vonirkinshtine

    vonirkinshtine Site Regular

    Yeah, I saw a similar picture on an Amazon review. No question it probably uses the cheapest material possible. But, if I know that going in, I can adjust to improve its survival (thermal shielding, good ventilation, etc). I will do a full deconstruction after today's 8hr run test.

    I turned it on around 6:30am. I'll get some thermal imaging readings a bit later to check on PCB resistance and chassis heat dissipation.
  4. vonirkinshtine

    vonirkinshtine Site Regular

  5. vonirkinshtine

    vonirkinshtine Site Regular

    I tried really hard to get some quantitative data on how "bright" it is. We have a test hood at work that can give me brightness in Candela, but the light doesn't have a steady-burn mode...so I couldn't get super accurate readings.

    In a double-double flash, the sensor recorded a median value of 24.2 Candela. In a "ludicrous flash" (it's like a really bright flicker), the sensor was consistently recording higher than 60 Candela. In my world, that's not very bright on paper. But I don't think our test rig is well suited to this type of product. This Viper knockoff has reflectors, and optics, and it's line-of-sight brightness will be much higher than it's overall brightness.

    Typically, I see manufacturers advertise the power of the diodes in "Watts"...which is admittedly a bit deceiving because each diode is really only using a fraction of a watt each. If someone can clue me in to an actual industry standard of warning light brightness...I would love to know.
    Last edited: Apr 17, 2017
  6. vonirkinshtine

    vonirkinshtine Site Regular

    Here are the thermal imaging results:
    No hot spots. No areas of increased resistance on the PCB. I think I'm ready to install it and see how she runs in action.
    whatevah and Tony P like this.
  7. Jsherman88

    Jsherman88 Registered Member

  8. Tony P

    Tony P Moderator Support Staff

    Admin Post
    Please stay on topic. This thread is about the Viper knockoffs and is a user's personal review of it. Please create unique threads if you wish to review a similar (or different) product
  9. Kendreth

    Kendreth Member

    my mistake thanks
  10. vonirkinshtine

    vonirkinshtine Site Regular

    I'd bet the farm the light you linked to is the same as what I bought on ebay. I found ZERO identifying markings on any of the components on the PCB. It would be impossible to distinguish one from another.

    I sent two lights to Wilson to do an LED swap (turn a white/amber and red/red into a red/amber and red/white). Once I get those back, I'll install them and update further.
    Jsherman88 likes this.
  11. strobecrazy

    strobecrazy Senior Member

    Any updates? Thinking of maybe picking one up.
  12. vonirkinshtine

    vonirkinshtine Site Regular

    Yeah, I got everything back from Wilson (that guy is amazing).

    Still haven't installed yet. Dept. SOGs say I'm good, but I want to clear it with Chief first.
    Tony P likes this.
  13. JazzDad

    JazzDad Just Another Faceless Member Silver Level Member

    If you can get a real S2, you could put it through your same test procedure (assuming you could get a similar pattern on it).

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