voltage 12v 14.7v

speed

Well-known member
Mar 31, 2012
48
spain
#1
hi
bought 2 new lights
installed both lights but 1 light is not working, other light is working fine
now the seller is saying its my fault the light is broke because my power supply gives 14.7 voltage and his light is only 12v
which seems like a lot of bul to me?
what you guys think?
thank you
 

slickraft

Well-known member
Oct 7, 2016
219
Phoenix
#4
Which lights do you have?
LED light's are more sensitive to voltage differences, but a 12 volt rated light should be able to stand a couple volt variance.
Not necessarily true but we can't say without knowing more about the LED bulbs you bought. Some poorly designed LED bulbs will not survive running 2.7 volts above their rating.
 

shakham

Well-known member
Aug 23, 2016
45
Central, NJ
#8
Where did you measure the voltage, at the light or at the transformer?

Do you have any documentation on the lights? Do they specify the voltage requirements?
 

gary300

LifeTime Supporter
Dec 15, 2014
500
Riverside California
#9
12V transformers for pool lights do not have a regulated output. An unloaded transformer will have a higher output voltage is no load is applied than if there is a load. The amount of the load will determine the output voltage. LED lights have a much smaller load than incandescent lights do, so will not bring down the transformer output voltage as much as higher load incandescent lights will. Also, a higher wattage transformer will be less affected by load than a smaller transformer would be.

When you told your supplier that you transformer was putting out 14.7 Volts, where did you measure the voltage at?
 

JoeGolan

Bronze Supporter
Nov 2, 2016
200
Palm Coast, FL
#10
12V transformers for pool lights do not have a regulated output. An unloaded transformer will have a higher output voltage is no load is applied than if there is a load. The amount of the load will determine the output voltage. LED lights have a much smaller load than incandescent lights do, so will not bring down the transformer output voltage as much as higher load incandescent lights will. Also, a higher wattage transformer will be less affected by load than a smaller transformer would be.

When you told your supplier that you transformer was putting out 14.7 Volts, where did you measure the voltage at?
I am surprised that you did not mention wire size as well. At these low voltages, the actual wire run could drop the voltage delivered to the light depending on the AWG size.