That is because anything that would stop or block lightning is a scam.  A 6kV number does not exist IF the device is not properly earthed.  Again, only scams isolate from or stop lightning.  That camera suffers no damage is the 6kV transient connects to earth on a path that does not pass inside through electronics.

No lightning protector (or lightning rod) protects or isolates from surges including lightning.  Protectors (and lightning rods) are only effective as connecting devices.  Actual protection is done by what harmlessly absorbs hundreds of thousands of joules - earth ground.  Protectors (and rods) protect only by connecting that energy harmlessly to earth.

All protectors (and lightning rods) are fast enough.  What defines that protection?  Quality of and connection to (it must be a low impedance connection) to earth.  How to increase protection?  Make a lower impedance connection (ie wire must be shorter; not thicker).  Expand / upgrade the single point earth ground.  Only then is a protector more effective.

Resistance is irrelevant.  Impedance is the significant parameter.

For example, a 12 meter copper wire might be 0.2 ohms resistance.  That same wire is something like 120 ohms impedance.

Other factors also apply.  If a wire has numerous sharp bends, resistance does not change.  But impedance increases significantly.

From an engineer at WXIA-TV:

From the book "Safe Coordination Between Power and Communication Surge Protection":
From Smiths Power application note entitled "AC and DC Power Protection at Communication Sites":
From QST Magazine (by the ARRL) entitled ""Lightning Protection for the Amateur Radio Station"
From Mike Holt's "Grounding vs. Bonding":
From Electrical Engineering Times entitled "Protecting Electrical Devices from Lightning Transients":
Wire thickness affects resistance.  Impedance is defined by wire length and other parameters.  No soundbyte (apt) explanation of science exists.  Sound bytes (simplistic answers) are a first indication of junk science reasoning.  Professionals cite impedance - not resistance.  A protector is only as effective as its earth ground.  That means single point earth ground AND a low *impedance* connection.

That 6kV protection is effective only when a low impedance connection to ground exists.  Then a surge that might create 6000 volts instead creates near zero volts.  How close to zero?  How low is that impedance?

Install SPD

The Surge Protection Device (SPD) is a component of the electrical installation protection system.

This device is connected in parallel on the power supply circuit of the loads that it has to protect (see Fig. J17). It can also be used at all levels of the power supply network.

This is the most commonly used and most efficient type of overvoltage protection.

http://www.electrical-installation.org/enw...on_Device_(SPD)

https://www.youtube.com/watch?v=ltfPOXsqtTs