is 200 amps to much

[terry1738]

Considering buying a light bar and was amazed that some had quoted wattage as 2100W to 2400W thats 200 amps. I dont know what my alternator is rated at on discovery 4 TDV6 but that seems like an awful lot of current drain yet I see these things on lots of cars.
Any one know if this will cause problems with my electrical system.
I can power it off a second battery but thats not isolated while the car is running so the alternator is still under load.
Any advice welcome

[Vern]

That is obviously a typo.

[Tombie]

A common lie in the LED lighting world.
Is claims of outrageous outputs..

And - Wattage is not a measure of light output - yet is commonly used (incorrectly).

No LED is driven at 100% or they will fail, the thermal management is what is important to making a light bar survive.

Also - and this is critically important to ALL humans. The eyes ability to resolve light is limited - too much and you will not be able to see correctly.

You also do not want a hot spot in front of the vehicle or you will not be able to see things beyond it as your eyes will naturally “tune” to this location.

[Pinelli]

Sometimes LED lamps are described using the equivalent power of incandescent lamps to give the same light. Any chance that's the case here?

[bee utey]

Real life current draw of a cheapie "2400W" light bar would likely be between 20 and 50 amps, depending on how terrible the driver circuits are.

[terry1738]

Here are the so called tech specs this is not the only light bar on ebay that claims a wattage of over 2000W there are dozens of them I just couldnt believe its correct thats why I asked the question.
I fully understand the difference between luminosity and wattage and am familiar with the equations that determine wattage volts and resistance and they have no relationship to lumens however the tech specs seem pretty clear and it also specifies a massive luminosity though at what distance this is measured is not mentioned so I assume its the default 1 meter.
So assuming these specs are correct I would imagine I would have flat battery quiet quickly.
Is there even a 10 Watt LED available?
the add is at
Quad-Row 29"INCH 2160W LED WORK LIGHT BAR Combo Lens For Ford Jeep Offroad 30/32 | eBay

Quad-Row 29"INCH 2160W LED WORK LIGHT BAR Combo Lens For Ford Jeep Offroad 30/32 | eBay

Technical Specification

Power: 2160W ---(334800lm)
LED Quantity:216pcs*10W OSRAM LED chips
Operating Voltage: DC 9-32V(Fit 12V/24V vehicle)
Beam Angle: 30 degree(spot beam)&60 degree(flood beam)
Color temperature: Pure White 6000K
Working Temperature:-40-85 degree Celsius
IP68 water and dust seal,about 50000 hours life time
Material: Black Die-cast Aluminum profile, PC lens, solid bottom slip
Certified by CE & RoH

[bblaze]

you need to look at landrover ones, not ford and jeep ones. There lies the problem
cheers
blaze

[terry1738]

Real life current draw of a cheapie "2400W" light bar would likely be between 20 and 50 amps, depending on how terrible the driver circuits are.

what driver circuits are used in an led device?

[bee utey]

what driver circuits are used in an led device?

Constant current drivers, that with a wide range of input voltage the driver has to keep the current within safe limits. Most cc drivers produce pulsed DC that you can see sometimes if you whiz a LED light past your gaze, you'll see stripes of brightness.

Cheap, narrow voltage range LED lights just use resistors that waste a fair fraction of the input power. This is most commonly used on the long strip lights made for 12V only.

[Jpkat]

look i have brought those sort of cheapo led light bars from eBay before, led's fail one after another, a quick search for a 10 Watt leds shows that the led chip would be huge so i'm sure they're over exaggerating i have brought and installed a set of 4WD supa centre 9 inch round lights they're awesome, i'm sure the light bars would be the same and they're not to badly priced

LED Light Bars , 4WD & Outdoor Products - Australia