I've bought a few LED spots and floods and small led car dome lights and even a monster 300W lightbar and none of them draw the current I'd expect at 12VDC. (the car dome lights) and otherwise most of the lights say something like 9-32VDC input (so they work on 12V or 24V DC systems). When I buy an 18W light from say Kawell, I'd expect it to draw 1.5 amps but it measured 1 amp. I think every light I ever measured drew about 1/2 to 2/3 of the current I expected.. (and note that I am running with supplies that can source the current at 12VDC,,,
I attributed this to Chinese sellers over stating their specs but I think there could be more to the LED light power specifications,. this link has some weird stuff talking about 1W LEDs and 3W LEDs current draw... what am I missing? (note that I am presently looking at buying some lights for my friend's boat and considering bars that use multiple 3W, 5W, or 10W LEDs (you can find my other thread if interested!).
https://www.hydrogrowled.com//LED-Technology-LED-Basics-What-is-a-LED-W67.aspx#bas5
"LED wattage classifications have been made very confusing by manufacturers such as Cree, Osram and Luxeon, for example a 1W LED is driven at 350mA of current; however a 3W is driven at 700mA. Even though the 3W has only double the current of a 1W, it is somehow classified as consuming triple the wattage."
I attributed this to Chinese sellers over stating their specs but I think there could be more to the LED light power specifications,. this link has some weird stuff talking about 1W LEDs and 3W LEDs current draw... what am I missing? (note that I am presently looking at buying some lights for my friend's boat and considering bars that use multiple 3W, 5W, or 10W LEDs (you can find my other thread if interested!).
https://www.hydrogrowled.com//LED-Technology-LED-Basics-What-is-a-LED-W67.aspx#bas5
"LED wattage classifications have been made very confusing by manufacturers such as Cree, Osram and Luxeon, for example a 1W LED is driven at 350mA of current; however a 3W is driven at 700mA. Even though the 3W has only double the current of a 1W, it is somehow classified as consuming triple the wattage."