The Light Cancelling Flashlight Experiment Water Cooled 72,000 Lumen 1 day ago   11:36

The Action Lab
In this video I talk about the idea of a light cancelling flashlight. I show you how you can make a setup in which you actually gets a light that is less bright when you shine more light on it using a Michelson Interferometer setup. Learn about the idea of light cancellation using the same ideas as noise cancellation.

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DISCLAIMER: Any experiment you try is at your own risk

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Water Cooled 72,000 Lumen The Light Cancelling Flashlight Experiment 1 day ago   04:45

People wanting a big light for their car: light bars exist now, cheaply and reliably
Here's that neat 1150 lumen light:
Q: why are you only turning it on for short bursts?
A: The reason is just that I only had one night with the camera guy to get all the shots and I was paranoid of losing battery. The other reason is that it's so bright that it's annoying and I loose the ability to see at night
Q:Will it eventually overheat?
A: No, it can run off a power supply continuously with a stable coolant temperature.
Q: How long does the battery last?
A: The small battery back I'm using is made out of batteries I already had, and they will last 6 minutes. A bigger battery is easy

LED Chips:
I recommend using Boost converters to drive the LED's from 12v or so (No resistors, one per chip, can also drive the cooling stuff with the same 12v):
Cooling Blocks:
Super neat pump/reservoir combo (much easier than hacking a bottle and much less likely to leak..)
Heat Exchanger:
Batteries (3) (connect in series for direct drive w/ resistors, connected in Parallel for 12v system with boost converters)
Super simple LiPo Charger:
**Don't over discharge your batteries! Research how to use LiPo batteries and monitor your cell voltage!! This product will monitor the cells and sound an alarm when they reach a low limit

Thermal Glue


Simple and cheap but probably not crap:

Another Cheaper option:

My Favorite Hakko High End Station:

60/40 Rosin Core Solder:
(I do not reccomend lead free solder)

Extra Tube of Rosin is always nice:

Desoldering Braid is good to have around:

Helping hands are also wonderful:

Here's an Imgur album of pictures taken that night!
Yes I would like to have used constant current drivers, but those would take up space and money that I don't have.

I made this back in February, but only got around to filming it a couple weeks ago. Thanks so much to Caleb Riston for the DSLR equipments and skills!

Thanks to ThruNite Flashlights for offering to send me a flashlight to use in this video! Any positive opinion of the flashlight is Caleb's or my honest opinion - but there is no way around the bias of free things.

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