can cfl bulbs be used upside down?
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Can compact fluorescent bulbs be hung upside down? CFLs can be installed base up. Although there may be a slight difference in lumen output depending whether the bulb is base-up or down, the difference is often imperceptible.
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Fluorescent and CFL bulb costs depend on the specific type of light. Generally they are cheap compared to LED ($3-$10 for a 100w incandescent-equivalent CFL bulb).
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All compact fluorescent (CFL) bulbs require a ballast, which is often integrated. All HID bulbs require a ballast, which is sometimes integrated. No LED bulbs require a ballast, although some are engineered to work with an existing ballast. ... Incandescent and halogen lamps do not require a ballast.
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Q: Are all CFL bulbs dimmable? A: No. The majority of CFL bulbs sold today are not dimmable. A CFL bulb that cannot be used on a dimmer will have the statement “not for use with dimmers” or “do not use with dimmers” marked directly on the bulb.
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Most light fixtures will work with standard dimmer switches, including those with halogen and incandescent lamps. ... Likewise, not all compact fluorescent (CFL) light fixtures can be dimmed. If you install dimmable CFL lights, you'll still need to check your dimmer to make sure it works with these types of bulbs.
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If you want to be able to dim your recessed lights, or control them with a remote or automated system, choose fixtures you can use incandescent, halogen or LED light bulbs in. Fluorescent light bulbs are not dimmable unless they have a dimmable ballast.
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Theorem: CFLs are not closed under complement If L1 is a CFL, then L1 may not be a CFL. They are closed under union. If they are closed under complement, then they are closed under intersection, which is false.
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CFL bulbs provide the light wavelengths that plant need for growth and produce much less heat than conventional fluorescent or incandescent bulbs. Compared to sunlight, CFL bulbs produce far less light intensity, so multiple bulbs may be needed to provide enough light for healthy plant growth.
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CFLs typically contain 4 mg of mercury. As long as the bulb is intact, the mercury is safely contained. ... The EPA recommends that you bring old CFLs to qualified recyclers, rather than disposing of them in trash cans or curbside recycling bins. You can bring old CFLs to The Home Depot for free recycling.
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Regular bulbs work just fine, though, especially if your plants are already getting some natural daylight. They key is to make sure they have the correct color temperature, measured in Kelvins.
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It is a popular misconception that 100w bulbs are illegal. There is a minimum standard in the lighting Regs. but no maximum. Sorry, but there is a maximum legal wattage !
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CFL types. Most of the CFLs sold are not full spectrum. Mostly they are in two color types: warm and daylight colors. And instead of indicating the color of bulbs when lighted, people use Kelvin to measure the light color (or also light temperature).
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CFLs are fluorescent lamps that emit light from a mix of phosphors inside the bulb, and were designed to replace incandescent lamps (a lamp that produces light as a result of being heated). ... A light-emitting diode, or LED for short, is a lamp that emits light in a very narrow band of wavelengths.
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CFL Grow Light Kits. CFL (Compact Fluorescent Lamp) lighting is a low energy, efficient way to get growing. Ideal for propagation lighting or in environments where heat is an issue, we offer a selection of the best CFL reflectors and lamps at incredible value!
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Compact fluorescent light bulbs may generally be used in enclosed fixtures as long as the enclosed fixture is not recessed. Totally enclosed recessed fixtures (for example, a ceiling can light with a cover over the bulb) create temperatures that are too high to allow the use of a compact fluorescent bulb.
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LED Lights: Light Emitting Diode or LED bulbs may be used indoors or outside. Compact Fluorescent light bulbs: Some CFLs may be used outdoors, but you should be sure to check the maximum temperature the bulb can withstand. ... Metal Halide light bulbs: These light bulbs are for indoor and outdoor use.
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They are often used for motion-sensing security lights or recessed lighting both in and outdoors. Bulbs with wide beam angles often act as general lighting in commercial environments, usually by providing overhead illumination in the form recessed lighting.