# Is the street light series or parallel?

Street lights are always linked in parallel because if they were connected in series, a problem in any of the bulbs would cause the entire line to be turned off and it would be dark until the fault was resolved. However, if they are linked in parallel, a malfunction in one bulb will not impact the entire line. They both provide light in different ways so either type of light source can be used for street lighting.

The choice between a linear lamp unit (LLU) and a solid state lamp unit (SULU) depends on space constraints and budget. LLUs are cheaper but they give out less light per watt while SULUs use less electricity but cost more per unit of output. In general, LLUs are good options for streets that see few traffic accidents or crime scenes because they use less energy than SULUs but more expensive lamps need to be placed farther apart to make up for their low output. On the other hand, SULUs are better choices for roads that see many traffic accidents or crimes scenes because they last longer without needing to be replaced as often and they produce more light per watt even though they are more expensive than LLUs.

As long as you aren't restricted by space or budget, either type of lamp unit can be used for street lighting.

## How are street light bulbs connected in parallel?

Because the voltage across each bulb would differ if they were linked in series, street light bulbs are connected in parallel. This means that all the bulbs will always get the same amount of current, so their light outputs remain the same regardless of how many are broken.

In reality, some degree of variation in voltage does occur because of resistance differences between the bulbs. However, this can be ignored for most purposes. Variation due to resistance is small compared to other factors such as location of fixture relative to electrical source.

The connection method used by street lights is called "shunt-wound" because part of each bulb's coil is removed and replaced with a wire that goes to the next bulb in the chain. This ensures that there is no danger of one bulb exploding due to internal arcing when another blows.

Parallel connections are also used in low-power applications where series connections are not feasible, such as flashlight batteries. For example, eight 1.5 V AA batteries can be connected in series to get 3 V, but if they are also connected in parallel then they will have the same voltage applied to them as if they were just two single cells.

## How are street lights connected in a series?

Street lighting lamps are all linked in A series, B parallel, C series parallel, D en. This means that all the bulbs will have about 1/2 the voltage applied to them, but they will still glow when current is flowing through them.

Here's how the different connection configurations work:

If you connect multiple lamps in series, then all the lamps will turn on and off together when the main switch is turned on or off. This is useful for lighting up large areas quickly or holding a single light source continuously on.

Lamps connected in series receive the same amount of current, so they will all burn with equal intensity. Any difference in wattage or age of the lamps will show up in their total consumption of energy.

Lamps connected in parallel receive unequal amounts of current, so some will burn out before others do. However, since they are replaced automatically by the circuit, this doesn't matter much. It does mean that you should use lamps of approximately the same rating though, or else some of the lamps will burn out too soon.

Enameled wire is used to connect street light fixtures in series circuits.

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