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Because when two lights use the same battery, both lights need the same power to work, so the power has to split in half making the bulb's brightness dimmer.

Ridiculous. If the lamps are connected in series, they will be dim because half the available voltage is dropped across each lamp. In parallel, they will both have full brightness.

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14y ago
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11y ago

For a lamp to burn at its rated power it must be subject to its rated voltage which usually corresponds to the supply voltage. Components in series are each subject to a voltage drop, the sum of which equals the supply voltage. The more components you have, the lower the voltage drop across each. So the voltage drop across each lamp reduces as more and more lamps are added and, therefore, the power of each lamp falls further -so they become dimmer. The brightest lamps, when connected in series, will be the lamps with the lowest rated power ('wattage').

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Q: Why do two lights connected to one switch get dim?
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Why are lights dim after the switch was replaced?

Because the juju has yet to be established in the new wiring. As soon as the juju takes hold, the light brightens. <<>> Recheck your wiring of the switch. It sounds like you may have wired two lights in series that may have been supplied from the one switch. Two lights from one switch have to be wired in parallel with each other. Use the discussion page if you need help with this problem


When installing lights with 2-way and intermediate switching control the intermediate switch must be connected to the?

to wire a lamp to be controlled from three places you need two three way switches and one four way switch. the two traveller wires that would normally run between the two three way switches must be connected to the terminals of the four way switch


What is a one way dimmer switch?

It is the terminology given to differentiate the dimmer switch from a three way dimmer switch. It is a replacement for an ordinary lighting load switch when you want to dim the lighting load for aesthetic value.


How many line conductors are installed between the switch and light fixture?

One. A typical "two way" ON-OFF light switch is a Single Pole Single Throw (SPST) switch with two terminals. It is wired in series with the fixture: that is, the power circuit is routed from the breaker to one side of the switch. The other side of the switch is connected to the "phase" or "power" terminal of the fixture. In a 115VAC single phase circuit, the other terminal of the fixture is connected to neutral. A "three way" switch circuit consists of two switches in different locations, each of which is a Single Pole Double Throw (SPDT) switch with three terminals. A typical use would have one switch at the top and the other at the bottom of a set of stairs. For the sake of clarity, we can label the "common" terminal on a SPDT switch the "C" terminal. This terminal is internally connected to one of the other two terminals, call them "A" and "B", depending of the position of the switch. A three way switch is connected with the circuit breaker connected to the "C" terminal on either switch. Conductors connect the "A" terminal on one switch the the "A" terminal on the other switch and the "B" terminal on one switch the the "B" terminal on the other switch. The remaining "C" terminal is connected to the "phase" or "power" terminal of the fixture. The other terminal of the fixture is connected to neutral. Note that, in either case, there is no neutral wire connected to the switch. Ground conductors do connect to the chassis of the switch box and the fixture, but they do not carry current and do not affect the operation of the circuit.


What does com mean on a light switch?

In a situation where there is only one switch controlling the light or lights you normally use a spst (single pole single throw) switch that has only two connection terminals. This type of switch either connects or disconnects the two wires that are connected to the switch's terminals depending upon the position if the switch lever. The com terminal on a light switch means that it is a three way or the kind of switch used where there are two or more switches that controll the same light or lights. The three way switch is a spdt ( single pole double throw) . If you look closely you will find this designation somewhere on the switch. On the spdt switch you have three terminals, a common and two branches. In one postiion the common connects to one branch and in the second position the common connects to the other branch. If you are trying to install this switch in a situation where there is more than one switch controlling the light you must have the ability to correctly identify the common wire; if you can't do that you need help from someone who can do that correctly.

Related questions

Why are lights dim after the switch was replaced?

Because the juju has yet to be established in the new wiring. As soon as the juju takes hold, the light brightens. <<>> Recheck your wiring of the switch. It sounds like you may have wired two lights in series that may have been supplied from the one switch. Two lights from one switch have to be wired in parallel with each other. Use the discussion page if you need help with this problem


On Silverado 2000 When the lights come on you have One Dim And One bright?

You probably have a bad ground on your "dim" light.


What will happen to lights connected in parallel when of the lights is busted?

Nothing will happen to the rest of the lights if they are connected in paralell. If they are connected in series when one light is broken all of the lights go out.


Does a 1982 Chevy S-10 have a dimmer switch?

Yes, the dash light dimmer switch is located next to the headlght switch. You rotate it one way and the lights dim out, rotate it the other way and they get brighter, keep rotating it that direction and the interior light comes on.


Are the lights in your school connected in series current or parallel current?

Overhead lights are typically connected in parallel. If they were connected in series, then, if one light went out, all of the lights would go out. Think of Christmas lights, they are connected in series. When one of the lights burns out, the whole string of lights goes out.


Are bright lights and dim lights on the same fuse?

We are going to need to know the year, make and model to help you with that one.


How do you get two bright lights and one dim light without a resistor?

1. Use 3 lightbulbs, with a 3 way switch. 2. Use 1 3-way lightbulb with a 3 way switch. 3. Use a diode in series with one bulb to dim it. 4. Use a silicon-controlled rectifier (SCR) with a simple circuit to cut out a certain percentage of each AC wave.


2000 dodge ram rear lights dim on one side?

2000 dodge ram wiring rear end tail ligts dim and right blinker works but very dim


You have on very dim headlight and one regular headlight it is the same on brights if you mess with the dimmer switch it will get bright but then your tail lights go off what is the problem?

I would check all the wiring first. Then, you should probably figure out if any lights need to be replaced. That's my guess.


When approaching another vehicle from the rear at night within how many feet must you dim your bright headlights?

If you are a courteous driver, you will dim them when you see their tail lights. No one likes bright lights in their mirrors, reflecting into their eyes.


Will lights in a series circuit will stay lit if one goes out?

Like the old Christmas tree lights, no; lights connected in series will not stay lit if one (or more) are either burned out or disconnected from the circuit. Lights in series are connected "head-to-tail". Take one out, and the circuit is incomplete and will not work.


When installing lights with 2-way and intermediate switching control the intermediate switch must be connected to the?

to wire a lamp to be controlled from three places you need two three way switches and one four way switch. the two traveller wires that would normally run between the two three way switches must be connected to the terminals of the four way switch