difference in normal tube light and cfl light?
969048
Compact fluorescents are very like ordinary fluorescent bulbs (see refs.) but with smaller, coiled tubes and reduced-size electronic components (starter, ballast) hidden in the base.
456270
While I have very very strong opinions on Bush's political agenda of robbing from the masses to give to his ultrarich handlers, I think it's best to focus on the technical side of your question regarding fluorescent bulbs verses incandescent bulbs.  Fluorescent bulbs (and yes, that's spelled right...lol) are four to six times as energy efficient as incandescent ones.  Meaning, for example, that a 15 watt Fl bulb produces as much light (in lumens) as a 60 watt Inc bulb.\n\nOk, great...we save three fourths of the energy...sounds good, right?  Sure...but it's not gonna happen.\n\nMany people won't switch because of up-front costs.  To replace all the light bulbs in your house would be a very very expensive feat.  Yes, it would save you a lot in the long run, but most of us just don't have that kind of investment money.  Another factor is that fluorescent light and incandescent light just isn't the same spectrum.  Most of us, in our own homes, prefer the warmer light provided by incandescent.  Think about how sterile a doctor's office, or a walmart, or an office, feels.  Not the way we want our homes to feel most of the time.  Switching may be smart money in the long run, but it's not really what most people would do given the choice.\n\nIf, by the way, you want to save massive amounts of energy...the way to do it would be to weather-strip every house in America...that's cheap to do and EVERYONE would like the result in their house!
809350
Here ya go (from the link):\n\n"Green [induced in alternating light-dark periods] microtubers were better than white [induced in continuous dark] microtubers for subsequent crop performance for most of the characters including tuber yield and general impression."  (Very technical first link.)\n\nBreaking that down for you: it's not in the growing that you find the difference.  All potato plants need light to grow.\n\nBut if when you are inducing the potatoes to grow - getting them to sprout - you keep them in keep then in the dark, they turn out worse than if you give them a span daylight before planting them.\n\nI have to apologize - I can't find any easy reading on this on the Internet - so these are hard-to-read scientific abstracts.
114097
casey's last sentence is wrong:\nthe more resistance the slower the flow rate \npressure is determined by voltage\n\njdub says:\n"for example...the higher the voltage, the greater the resistance, and the higher the current, the lower the resistance...etc.."\nshould say_ that a a higher voltage will need a greater resistance to oppose flow in order to keep the current the same, or if you want to raise current you would either raise voltage across given resistance, or lower the resistance at a given voltage.\n\nbrmick says:\nthat air is a better conductor than concrete,\nThis largely depends on the frequency of the source, gases are not generally considered conductive, while concrete which is largely water is a moderate conductor especially if wet or wetted.\nDO this take two light bulbs and wire one of each lamps leads to the other then tie it to its intended source (series) using the remaining leads. check the voltage across the source and between the lamps. Assuming you have two equal size lamps you have {nearly-ignoring impedance} doubled the resistance. and so the current and wattage are cut.
588135
Old flourescent lamps needs a starter switch because flourescents bulbs are made of enclosed mercury, argon and phosphor. Electrical current can flow freely through the tube but it will not light up. When you hit the starter switch it produces an arc, then electrons collide with the atoms and other gases to produce a plasma. Today, we have the rapid start lamp. Same principle, but it doesn't have a starter switch. Instead, the lamp's ballast constantly channels configured current flow resulting a voltage across the tube to heat up electrode filaments very quickly, boiling off electrons, which ionize the gas in the tube. Then the voltage difference between the electrodes establishes an electrical arc to turn on flourescent lights.
176276
Regular light bulbs produce a great deal of heat.  The filament used is resistant to the heat but not heat proof.\n\nThe greatest stress on the filament is actually during heating  and cooling.  The metal expands on heating and contracts on cooling.  This stresses the metal.  Over time the stress causes weak spots that eventually fail.  \n\nThat is why a bulb often burns out just as you turn it on.  The heating up stresses the filament.  The other thing you'll find is that the light just worked, then when you try to turn it on again, it is burned out... it has failed while cooling from being turned off.\n\nOther bulbs\nFlourescent bulbs work using gasses in the bulb. They use a metal vapour.  When the bulb is off the vapour condenses (becomes a solid) on one end of the bulb.  It is vapourized using a small heating element.  That is why it takes a second for them to turn on.  Often when they fail they have a slight glow... this is because the heating element has failed and the metal (usually mercury) hasn't vapourized.  The elements fail for much the same reasons a traditional bulb fails.
882455
Not sure what you are trying to do but it kind of sounds like you are attempting to replace an arc-discharge light with an incandescent.\n\nThey have fundamentally different drive requirements. The arc-discharge has a negative resistance and it will not operate without a ballast designed specifically for that lamp. Such ballasts sometimes include active power-monitoring. The lamp and the ballast need to be paired with each other. Using a lamp and ballast not designed to work together will result in one of: won't work at all; will have very short life; will have unstable operation.\n\nThe incandescent lamp has a resistance that changes dramatically as the filament heats up and it is therefore self-ballasting. It works best when operated from an approximately constant-voltage source, not a constant-power source.
666930
less light makes it to your eye
233283
a regular light bulb \nas apposed to a floresent
1026089
1) the rheostat (that little knob that increases or decreases the light coming from the light source)\n\n2) the iris diaphram (works like the iris of the eye, making bigger or smaller circles for the light to pass through)--this is usually part of the condenser
316405
If your talking about regular incandescent bulbs in residential lighting fixtures, then its just the filament size and material that produces different levels of brightness.  For a given bulb, if you want to make it brighter/dimmer you can lower the voltage applied to the bulb.  Regular bulbs run on 120 volts.  There are dimmer switches for home lighting that get installed in the wall, but you can also get certain extension cords that have a variable resistor built in to allow you to control the voltage applied to the bulb, thereby affecting the brightness.
94366
Check your local Home Depot.  40 watt is the 4' bulb with the plant/aquarium label.  (appx $7).  get an inexpensive 4' single bulb fixture with cord and pull chain on/off (appx $8).  If you want rapid start, i believe you're just wanting something that doesn't take a long time to come on.  Just ask if is has a magnetic ballast or a rapid start ballast.  For a few dollars more get an electronic ballast and drop down to a 32 watt T8 bulb, which will cost a little more initally, but it will last longer, reduce energy costs and turn on and off like an incandescent bulb.  One warning though, don't use these around reptiles.  The frequency that these ballasts and bulbs operate at creates a strobe effect to reptiles and will drive them insane.  Consult a pet store if you're looking for something to use around reptiles.
41971
Cf graph below, lm/W for lighting sources varies between 1 /m/W for candles and over 100 lm/W for modern fluorescent lighting solutions.\n\nIncandescent lamps are around 10 lm/W, i.e. we can get up to 10 times more lm per Watt with other solutions.
808047
By touching the lamp you are changing the capacitance of the lamp and a circuit inside the lamp detects the change and turns on the light. \n\nIn order to offset sensitivity to temperature and other objects near the lamp it is designed to be triggered by a sudden change in capacitance - so when you slowly touch it, or tap it with an object with insufficient cpacitance then the circuit does not detect enough of a change to trigger.
500946
A fluorescent lamp is a type of lamp that uses electricity to excite mercury vapor in argon or neon gas, resulting in a plasma that produces short-wave ultraviolet light. This light then causes a phosphor to fluoresce, producing visible light.\n\nA sodium vapor lamp is a gas discharge lamp which uses sodium in an excited state to produce light. There are two varieties of such lamps: low pressure and high pressure.\nLow pressure / LPS / SOX\nLPS Lamps (Low Pressure Sodium), also known as SOX Lamps (Sodium OXide), consist of an outer vacuum envelope of glass coated with an infrared reflecting layer of indium tin oxide, a semiconductor material that allows the visible light wavelengths out and keeps the infrared (heat) back. It has an inner borosilicate 2 ply glass U shaped tube containing sodium metal and a small amount of neon and argon gas Penning mixture to start the gas discharge, so when the lamp is turned on it emits a dim red/pink light to warm the sodium metal and within a few minutes it turns into the common bright orange/yellow color as the sodium metal vaporizes. These lamps produce a virtually monochromatic light in the 589 nm wavelength. As a result, objects have no color rendition under a LPS light and are seen only by their reflection of the 589 nm light.\n\nLPS lamps are the most efficient electrically-powered light source when measured for photopic lighting conditions. — up to 200 lm/W. As a result they are widely used for outdoor lighting such as street lights and security lighting where color rendition is viewed by many to be less important. LPS lamps are available with power ratings from 10 W up to 180 W, however length increases greatly with wattage creating problems for designers.\n\nHigh pressure / HPS\nHigh pressure sodium (HPS) lamps are smaller and contain some other elements (for example, mercury), produce a dark pink glow when first struck, and produce a pinkish orange light when warmed up. These lamps produce continuous spectrum light (not monochromatic), hence colors of objects under them can be distinguished. This leads them to be used in areas where good color rendering is important, or desired (such as to identify the color of a fleeing suspect's car).\n\nHigh pressure sodium lamps are quite efficient — about 100 lm/W, up to 150 lm/W, when measured for Photopic lighting conditions. They have been widely used for outdoor lighting such as streetlights and security lighting. Understanding the change in human colour vision sensitivity from Photopic to Mesopic and Scotopic is essential for proper planning when designing lighting for roads.\n\nBecause of the extremely high chemical activity of the high pressure sodium arc, the arc tube is typically made of translucent aluminum oxide (alumina). This construction led General Electric to use the tradename "Lucalox" for their line of high-pressure sodium lamps.
783681
Fluorescent light is better for seeing the true color of things, but incadescent bulbs are better for the eyes.  While the white light is good for appllications where color clarity is key, the flisker of the bulbs is more straining.  Fluorescent bulbs are also more energy efficient and have a longer lifetime.  The only drawback is that they contain some mercury, so you have to be aware of the regulations regarding the disposal of fluorescent bulbs/tubes.
1006328
Because of the difference in the index of refraction, with everything else equal, the glass should be brighter because it is less diffuse.\n\n\nhttp://www.findarticles.com/p/articles/mi_rlg4413/is_SLGG0003/ai_n15607430\n\nhttp://www.madsci.org/posts/archives/Jan2003/1042659817.Ph.r.html