Both 120 volt and 240 volt lights run with the same 100% output and use the same amount of electricity. A 1000 watt light uses the same amount of current in 120 volt as in a 240 volt light. The standard outlet in your house is 120 volt.
You may want to use a 240 volt if you plan on running several lights off of one circuit breaker. The maximum wattage on a 120 volt circuit is 1500 watts, per National Electric Code. With the proper breaker 240 volt circuits can carry up to 5760 watts. This means that you can plug several high powered lights into a timer or controller that will turn them all on and off on the same circuit. 240 volt is also considered to be more 'realistic' because it uses half the amounts of amps. Amps x Volts = Watts.
Every ballast uses a certain amount of amps depending on the size of the ballast. A typical circuit in a house will only be able to handle around 15 amps. This is the most beneficial part of using 240 volt ballast instead of 120 volt. A 240 volt ballasts use half of the amount of amps of its 120 volt counterpart. This will allow you to run more lights and watts while using the same number of amps.
Installing a 240 volt outlet is considered 'basic' electrical wiring and can be done on your own with the correct tools and some type of prior electrical knowledge or available literature. Electricity is very dangerous and wiring on your own should not be attempted unless it is done carefully and accurately. If you don't know what you are doing then you should hire a professional.
Sincerely,
Hydro Pacific Online Crew
















