Cameras in exit signs?
I hate to beat a dead horse but it's already been pointed out in comments before mine--there are products that will fit your needs on the market.
They are real-They have been "tested" and approved.
As I see it here is the reason for "testing,approval,inspection agencies,Ul labs...,etc..
Changing an existing item or device or fixture is something that "can" be done ,"can" be done without changing the initial function of the listed product---
I forgot one most IMPORTANT thing--some of us can do it !Our experimenting/tinkering/educated adaptations may produce "The Better Mousetrap"!
But others[ and probably most] will not do it correctly.
Products are listed in order to -[and this is where it gets really good]
1}PROTECT THE INSURANCE COMPANIES!
-it's a fact of life and one that actually makes complete sense--it's the one time that a big buisness will profit from concern for the public.If you don't have a problem you just keep paying in and they'll never have to pay out.I actually think it's one of the few even buisness models in life.
They don't want something to go wrong resulting in a possible payout situation.
If you don't follow the rules-useing listed products,using licsened electricians,following code-then all bets are off and you lose-the money you paid in through the years is for naught[nothing] because you blew it-thats right you blew it-the smart electrician will find a way to make their client realize that they are doing things the right way out of concern for the customers life and also their pocketbook.
2]to attempt to set a "MINIMUM"[that means "at least",it doesn't say best]
level/expectation of performance so that people get to live another day-insurance companies get another payment and life goes on.
Figuring out wether something will function the same/as well /or maybe better is something best left for the garage bench and not for a situation that can in ANY way possibly affect life or property.
I would NEVER take it upon myself to decide that I know best or better and alter a product--WHY?--because it could be my son and your son who were in that mall store where a fire begins---I do not have to go any further-
We have rules because we want everybody to have the same chance to come out alive-
I didn't say gaurantee to get out-I said chance.