I have a 150watt power supply with the following specifications below, that powers 50watt 24VDC light fixtures. Currently, you can only connect 3 light fixtures to this power supply and I'd like to connect 6 fixtures at 25watts by limiting the power draw on the 50watt fixtures down to 25watts. What kinda of resistor would need to ensure each fixture is maxed and restricted to 25watts?
Buy 25W bulbs and fit those - reducing the power to existing bulbs will drastically decrease their light output, alter their colour massively, and shorten the bulbs life if they are halogen.
It would also be VERY inefficient - bulb output would be only 12.5W, with 12.5W wasted as heat in the resistor.
You can not use resistors because thay will be using up power to. Put two of your lights in series three times and you will have all six lights powered at half power.
You can not use resistors because thay will be using up power to. Put two of your lights in series three times and you will have all six lights powered at half power.
Each PAIR of bulbs will theoretically output half the power of one lamp. But since a light bulb's current isn't linear to the current the serie bulbs will output more then half power. Mostly as heat, and little light.
You can not use resistors because thay will be using up power to. Put two of your lights in series three times and you will have all six lights powered at half power.
But each lamp will be operating at 1/4 of its rated power, which will make it not useful as a source of illumination. It will will be glowing red, and not putting out hardly any useful light.