No, this is not true. The spiral-type compact fluorescent bulbs can be operated in any orientation provided that there is sufficient air circulation around the bulb. But if you put the bulb in a fixed enclosure then it will last longer if the base is facing downwards so that the heat is conducted away from the electronics in the ballast. Always follow the manufacturers's directions - usually written on the bulb. No, this is not true. The spiral-type compact fluorescent bulbs can be operated in any orientation provided that there is sufficient air circulation around the bulb. But if you put the bulb in a fixed enclosure then it will last longer if the base is facing downwards so that the heat is conducted away from the electronics in the ballast. And, always follow the manufacturers's directions - usually written on the bulb. Regards, Laszlo Herczeg, laszlo DOT herczeg AT austinenergy.com
A fluorescent light fixture is designed to operate on an AC voltage supply. To have the fixture operate off of a DC supply a power inverter would have to be installed. The power inverter would then change the DC to AC for the fixture to operate. These power inverters are reasonably priced these days and can be bought at most DIY stores.
I would say no. My reasoning is that if incandescent bulbs have as much or more mercury than fluorescent bulbs, the fluorescent industry would be debunking all the reports of a mercury problem.Incandescent lights do not need or use mercury to operate, so there is none in them.Fluorescent lights cannot be made at all without mercury, as it is the glow of mercury ions that produces the UV light inside the fluorescent bulb to excite the phosphor coating to make visible light.
If you are talking about the lamp then the answer is no. If you are talking about the fluorescent fixture, it should be. It is the fixture grounding that helps the tube to ignite. because of the close proximity to the metal of the fixture. There are many occasions when the fixture will not operate, but as soon as the ground is connected the fixture operates fine.
You talk about tubes specifically so I assume the 60 watt fixture is also designed for tubes. In such a case you should not use a higher wattage tube. If you were to replace a 60 watt incandescent bulb with a compact florescent of 75 watts you are correct that the heat would be less. If heat were the only de-rating factor you would probably be okay. Not sure how this is handled in the code.
Fluorescent light bulbs can not be connected to a constant voltage power supply, or they will self destruct. They must use a ballast in order for this not happening. This way they can operate under 430 mA, with a drop of 100 volts. The larger the bulb, the more voltage needed (going all the way up to 1.5 A).
The voltage of your area is what determines the operating voltage of all equipment. Equipment from other countries usually has to use a transformer to get the correct voltage. The voltage on a fluorescent fixture is printed on the ballast of the fixture. See if the voltage on the ballast matches the supply voltage of the system that you are going to use to operate the fixture.
Instant start fluorescent fixtures that use independent starters are becoming a thing of the past. These types of fixtures can not be started with out the device. The next generation of fixtures used rapid start ballasts that did not need a starter as it was incorporated into the ballast. Now new fixtures use electronic ballasts to operate the fixtures.
"Watt" is the rate at which the lighting device uses energy. "Lumens" is the amount of light it's able to produce from that steady stream of energy. Different technologies produce different amounts of light while using energy at the same rate. That's why a compact fluorescent lamp (CFL) uses less power and costs less to operate than an incandescent bulb, although it produces the same amount of light.
Yes a T12 lamp socket will take a T8 tube. The T8 tube will not operate. The T8 ballast is an electronic ballast where as the T12 ballast is a magnetic type. If you are changing over fluorescent fixtures to the smaller T8 lamps then the ballast has to be changed and the end sockets have to be rewired. The schematic on how to do the rewire is on the electronic ballast's label.
It depends on the bulb's wattage (its actual wattage, not the incandescent equivalent) and the cost of electricity where you're using the bulb. For example, suppose you have a CFL that draws 14 watts and electricity in your area costs 12 cents per kilowatt-hour. Using very rough approximations, in one hour your bulb would use about 1/70 of a kWh (1000/14 = 71.3), so the bulb would cost about 1/6 of a cent (12/71) to operate for an hour.
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