You can actually do the entire house for about a grand…….IF you are building new.
Believe it or not, use paper backed aluminum sheet that can be found in industrial supply houses. Put it between the gyproc and the studs. Down side, the cell phones are useless.
I never only have one high quality light on me so redundancy can be thrown out of this equation. I carry at least 3 Surefires on me when I am out, and sometimes the M3XS-UT depends on what I am doing. I am not looking for a single light to carry only one light. That is already a WML. And I carry others also a D4 and 2 more Surefires. If those 3 Surefires and the D4 all goes out, EMP hit.
I like carrying several more expensive reliable brands at once, less chance of them failing then two cheapo lights.
Ordering an Elzetta Charlie finally after I thin the Hinderer knife herd. Unused knives are worthless like unused lights or any other tools.
Hahahahahhaaha, OR just but Surefire Elzetta and Malkoff lights and never worry again. Not that I do my Surefires have been thrown 25 feet into the air to land on cement several times they work fine. :+1: 
Thanks for the advice sir. I am well versed… DARPA. 
Fenix is very durable and dependable.
The good ones: Thrunite is a tank. Zebra is also reliable. And my M43s from Hank.
All lights fail in ANY circumstance at ANYTIME. Break down in choice selection is the Engineering Design, build material components, quality control, pricing, etc……
I have done some high impact, and other extreme tests on some of my reviews. I will give insights here.
Sofirn : GREAT
Maglite : WORTHLESS
Bushnell Pro : TOTAL JOKE
Wuben : GREAT
Klarus : GREAT
Thrunite : Decent
Olight : Decent
Fenix : Decent
Powertac : GREAT
SureFire : TOTAL JOKE ( friend gave me the Defender version) Cracked body one it hit hard concrete floor
Plus quite a others. Too long to list.
But to give you basic insight. Just because higher price point DOES NOT MEAN DURABILITY or BETTER QUALITY.
When my daughter went to Uganda for 3 years I gave her a Zebralight H502 and a Fenix AA. Both held up under rough conditions so I would not have any hesitation in depending on them on myself for critical situations.
i have dropped both my Jaxman triples many times on driveway and they keep on tarking
Be careful…there are people who believe that peanut cost “just in case” are only for crazy preppers.
Nonsense, just because i have a 3-4 month supply of food without “stepping down” our eating habits….or designing a house that is as safe as possible without making it look like bunker….is just crazy talk.
IMO, the only cells I trust to still have usable capacity left after 10 years are Eneloops 1900mAh and lithium AA/AAA primaries, along with 18650s being the prime choice for off grid use.
Actually, I would consider 18650s to be the prime choice for long term emergencies if you take care of them and have a capable charger along with a renewable power source(solar panels).
Why Eneloops? Well, Eneloops 1900mAh are absolute beasts, and have extremely low self discharge. I would trust my life with them, no problem, even after 10-13 years of storage.
Why lithium primaries AA/AAAs? As long as I don’t use them once, they will last 20 years. These are for absolute emergencies. I have 8x primary AAs in their package since I’ve bought them.
Why 18650s? They have high energy density, and most importantly, their charging efficiency is super high, above 99% even at high currents(2A+), and if charge to 4,0V, can last for a very long time.
That is very important if you don’t have access to a stable power source, so 18650s are prime when you have access to a renewable power source.
If the zombie apocalypse comes then you don’t want to be hampered by ‘what battery is suitable’……
I am a longtime Malkoff fan and have never experienced any issues. All of Gene’s work is beyond compare in my book. I EDC an MDC daily and would gladly put my trust in any Malkoff in my collection.
I still have a couple Surefires, (a G2 and a 6P) no doubt they are durable & simple, but in the case of your question redundancy is more important. A single flashlight can be lost or broken no mater of the brand. I did drop a Nitecore MT2A from 3 stories up on concrete while it was still on, and it stayed on & never broke. for flashlights any of the good quality time-tested light models by Fenix, Surefire, Streamlight, Nitecore, Olight, Pelican, Zebralight, Thrunite, Klarus, Jetbeam, Maglite, etc will do the job. I just make sure i have 2 or 3 lights in emergencies, long camping trips, or remote areas.
Hahahhahhahaa Nice one with the surefire, See him throw it ? I would KILL all my China lights before I could ever kill a SF. Possibly a bad HT on the body.
Retracted statement
Once you bump up the food , I like high end water filters MSR and Kataydn water filters. Then boil for virus destruction if needed. If the micron of the filter is not small enough.
Other people will die let them if they are not intelligent enough.
You did what to a Surefire?.
What version of the Defender.
I have eight versions of the Great Defender.
And maybe I don’t have ’em all.
None of ’em will ever hit concrete. They levitate.
They gave you a Chinese fake junk garbage.
Similar to the one pictured. With Surefire prices they charge : Not standing up to my tests at at all. Total JOKE. I would buy Surefire for collecting only. Not field use.
Other brand stood up to better abusive/impact test conditions than Surefire. And at a FRACTION of the cost.