# Bumper Strobes Timing

**URL:** <https://forum.gbfans.com/t/bumper-strobes-timing/3655>\
**Category:** Ectomobiles\
**Created:** [November 23, 2021, 2:43pm UTC](https://forum.gbfans.com/t/bumper-strobes-timing/3655 "2021-11-23T14:43:29Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![lrdsatyr8](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/l/7ea924/32.png) [@lrdsatyr8](https://forum.gbfans.com/u/lrdsatyr8)\
**Post date:** [November 23, 2021, 2:43pm UTC](https://forum.gbfans.com/t/bumper-strobes-timing/3655/1 "2021-11-23T14:43:29Z")

</div>

Me and a friend have been having a bit of a debate over the timing of the [bumper](https://www.gbfans.com/wiki/equipment/proton-pack/bumper) strobes of the Ecto…

I say that they flash quickly 3 times and alternate between themselves.

He says they flash once at different timing rates and just look like they alternate even thou they don’t.

Anyone here have a definitely answer for me? Thanks!

---

<div class="post-metadata">

**Author:** ![zedr](https://forum.gbfans.com/user_avatar/forum.gbfans.com/zedr/32/182556_2.png) [@zedr](https://forum.gbfans.com/u/zedr)\
**Post date:** [November 23, 2021, 2:50pm UTC](https://forum.gbfans.com/t/bumper-strobes-timing/3655/2 "2021-11-23T14:50:42Z")

</div>

The original Ecto-1 [bumper](https://www.gbfans.com/wiki/equipment/proton-pack/bumper) strobes were driven by a [Whelen](https://www.gbfans.com/wiki/equipment/ectomobile/whelen) A413 strobe power supply. They alternate with a Double Flash, and in my experience you will occasionally only get a single flash out of one of the lights - I attribute that to the voltage input.

---

<div class="post-metadata">

**Author:** ![sprprops](https://forum.gbfans.com/user_avatar/forum.gbfans.com/sprprops/32/186712_2.png) [@sprprops](https://forum.gbfans.com/u/sprprops)\
**Post date:** [November 25, 2021, 12:41am UTC](https://forum.gbfans.com/t/bumper-strobes-timing/3655/3 "2021-11-25T00:41:23Z")

</div>

I had this same discussion the other day. The frame rate of the film makes it look like they alternate single flash, but I have the correct [whelen](https://www.gbfans.com/wiki/equipment/ectomobile/whelen) strobe power supply and correct grimes strobes and it only does an alternating double flash.