Roadshock light wattage difference

[rdhammah]

I'm not an electrical guy so please excuse my ignorance. Looking at the Roadshock flood lights at Harbor Freight. I see that the 6" flood light with 6 LEDs puts out 1050 Lumens and is 12 watts while the 3" has 4 LEDs and puts out 965 Lumens is 15.1 watts. Why would the smaller, less powerful one be a higher wattage? The reason I want to know is that I want to maximize my battery time.
https://www.harborfreight.com/6-in-led-flood-light-57190.html  vs.  https://www.harborfreight.com/3-in-led-flood-light-64322.html

[hardwater diehard]

https://realtytimes.com/headlines/item/1022525-which-light-bar-is-best-cree-vs-osram#:~:text=The%20first%20reason%20is%20its%20durability.%20If%20you,led%20light%20bar%20is%20compatible%20with%20many%20LEDs.

[rdhammah]

does this mean 1.08A draw per LED or per light bar?
https://www.walmart.com/ip/2pc-7-Ultra-Slim-Single-Row-Off-Road-CREE-LED-Light-Bar-1530lm-18W-IP68-Waterproof-12V-24V-Fog-Driving-Work-Lights-Trucks-ATV-Cars-60-Degrees-Flood/915023241

[esox_xtm]

18W is the total draw for the bar.

I suspect you're most interested in how long you can run the light(s) on a given battery. To convert watts to amps, divide the wattage by the voltage. In this case the current draw is 1.5A.

If you have a 7Ah battery (delivers 7A for one hour or 1A for 7 hours or whatever combination equals that) you'd get a little over 4.6 hours of run time.

Hope that helps.

[rdhammah]

thanks, esox. The plan is to mount a light on my ice sled and run it off a FF battery, independent of a FF. The writeup said 1.08A per unit