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Light Bulbs and Artificial Lighting
Artificial lighting has become standard in the homes and companies of most countries. It is used for concert effects, growing food, and reading a book in bed at night.
2,482 Questions
What kind of light bulbs should you use for plants?
Because the type and concentration of chlorophyll pigments in the plant can vary, an unfrosted incandescent bulb is the best choice as it emits light over the entire visible spectrum whereas fluorescent lights generally emit very specific wavelengths depending on the gasses they contain.
They use less energy to produce light, and thus save energy and help to save the environment through conserving electricity. The energy efficient light bulb applies fluorescent lighting technology to replace incandescent lighting technology. In the latter, a filament is heated past red hot to white hot to emit useful light. This creates a lot of heat, and is inefficient. The fluorescent tube screws into a socket just like the incandescent lamp, but has electronic circuitry built in to supply the elevated voltages necessary to operate the coiled fluorescent tube. Inside that tube is a gas mixture that is ionized by the voltage, and the ionized gas emits useful light. This process is much more energy efficient than incandescent technology.
What can circuit diagrams be used for?
Circuit diagrams, also known as electric diagrams, show the inside of their circuitry. It's mostly used to explain how the basics of circuitry work or how light bulbs light up.
What happens to the energy wasted in a light bulb?
electircal or photo electrical energy. Photons are shot across from panel to another panel this sparking back and forth creates the light you see.
Answer: Electricity is the energy input into a light bulb. It either heats afilamanet to produce heat and light, r excites the gas contained in the bulb (in flluorescent tube) to emit visible light directly or emit UV light which interacts with a phosphor coating in the tubes to emit light.
What kind of light does fluorescent light produce?
Main one is light energy. Also some heat is produced
How to change back up light bulbs?
Every single make, model and year of vehicle is going to be slightly different so its impossible to give a detailed answer. In general however, I'd start by referencing your owner's manual which may have instructions and illustrations. See sources and related links below to lookup the correct back up light bulb part numbers.
Why are light bulbs made of tungsten?
Tungsten is a highly densed energy solid metal whose atoms collide continuosly when heated thereby emiting light of different frequencies visible.
What type of wire is used in a light bulb?
A light bulb glows because of a very fine wire inside the glass bulb called a 'filament'. When an electrical current is put through the filament, assuming the voltage is high enough, it will begin to heat up and glow because such a small wire cannot handle the flow of electrons and has to discharge them through heat and light. Also if you put to much voltage in it will heat up the filament too much and melt it. Incandescent (filament) light bulbs fail over time because they slowly lose small amounts of wire until the filament breaks and stops glowing.
Do plants grow better in artificial light or under sunlight?
It depends what you mean by better. They will grow more naturally in sunlight but can be forced artificially with lights and may produce more and be grown out of season. I would say natural is better but then we have a world to feed.
Where can one purchase LED GU10 light bulbs?
Shenzhen liur photoelctric technology Co., Ltd is a professional high technology manufactury base specializing in design, production, research and development of various LED lighting, such as Global bulbs, PAR lamp, spotlight and other LED lamps.we focus on LED lighting and landscape lighting and LED display products. All products are designed and developed by our technician, now there are many kinds and different watts LED lamps, mainly from 2W to 18W LED lighting. We conduct advanced design, excellent material and professional handicrafts which enable us to win more customers for the high quality and competitive price。Our LED products are receiving high appreciation from America, Europe, Japanese and other countries around the world.
If you have any questions about our LED products,please send them to my e-mail byg88@163.com.I will be very glad.Do light bulbs last longer if you always leave them on instead of turning them off when not needed?
They might not last longer, but the theory is; like ANY electrical/electronic device, when you turn it on & off, there is current surging through it (causing a rapid change in heat & density). This causes the device to change states very rapidly, analogous to playing on a see-saw, pressure (in the form of electricity) is being applied and then taken away very quickly. The see-saw will fatigue and fail quicker than if it were always at rest.
Total resistance decreases:
1/R(total) = 1/R1 + 1/R2 + 1/R3
Assuming each lightbulb has the same resistance: R1 = R2 = R3
1/R(total) = 1/R = 1/R + 1/R = 3/R
R(total) = R/3
Before the bulb was added:
1/R(total) = 1/R + 1/R = 2/R
R(total) = R/2
R/3 < R/2
Do higher watt light bulbs run hotter or brighter than low watt light bulbs?
yes The higher the wattage the greater the heat. the filaments in each wattage must be of a greater diameter to handle the current. if the filaments are of a greater diameter ergo they draw a greater current from the voltage supplied.
Do light bulbs help plants grow better than sun?
No, sunlight has the perfect radiation and rays you need in a plant. A light bulb doesn't. ----
How many light bulbs can a 6 volt battery light up?
If the type of light bulb you are using was made to run on 1.5 volts, a 1.5 volt battery should be able to light up one or several of those types if they are each wired in parallel directly across the 1.5 volt battery.
If the type of light bulb you are using was made to run on 0.75 volts, a 1.5 volt battery will light up two or more of those types if they are wired in pairs in series across the battery.
If the type of light bulb you are using was made to run on, say, 3.0 volts, a 1.5 volt battery will not light it up very much - it may just glow dimly.
If the type of light bulb you are using was made to run on any voltage higher than, let's say 5 volts - for instance a standard 120 volt household bulb - then your 1.5 volt battery will not be able to light one of those up at all.
Another answer
You can wire any number of 1.5v bulbs in parallel, but for each one you add you will draw more current. Draw too much current and the battery will get hot and may explode, depending on what it is made of.
How long the battery will be able to keep the light bulbs lit will depend on the size of the battery, meaning how much charge it can hold. (Its capacity in amp.hours.)
Where can one purchase a black light bulb?
Maglite bulbs are quite a specific product and have attracted a large following online of people selling them. Amazon is probably the easiest place to buy them for a lot less than most "Bricks and Mortar" stores, along with eBay and Gumtree.
Incandescent lights are the least expensive, but the shortest lasing at ~ 1500-2000 hours. This type of lighting inefficiently creates an over abundance of secondary heat.
Fluorescent lighting is moderately priced and lasts 5000-8000 hours (4 times longer than incandescent). This type of lighting is available in warm and cold varieties and is ~4 times more efficient than incandescent. Fluorescent lights do not operate well at low temperatures and must come up to operating temps before maximum light output will be appreciated. Mercury is a concern when disposing of these bulbs, and they tend to heat up when lit for a time.
Light Emitting Diode lighting is rather expensive but last upwards of 50,000 to even 100,000 hours. LEDs are moisture, vibration and shock resistant, and instantly obtain maximum output. Most LED lights produce a low lumen for their respecive size. LED light bulbs are true watt misers being ~ 20times more efficient than incandescent, and they remain very cool to the touch. Like fluorescent lights, different color temperatures are available for warm or cool lighting. LEDs also come in many color varities.
I think the efficiency claims above for LEDs are overstated. Please visit Donald Klipstein's lighting page to view unbiased information on lighting efficencies. Commercially available LED products have not yet exceeded the efficiency of T8 and T12 fluorescents.
What material is used in modern light bulbs as the resistance?
Glass, a certain kind of metal for thefilament(if incandescent), sufficient wiring for the bulb, a mountable surface for the bulb to attach itself to, insulation (again, for incandescent). And, forfluorescent bulbs, a certain type of gas on the inside in the place of the filament.
What are the advantages of using compact fluorescent light bulbs?
Some advantages are that CFL light bulbs last longer, so in the long run they are cheaper. They also use less energy. They are very versatile since they come in different shapes they can fit into almost any fixture.
CFL or Compact Florescent Lights are a lot more energy efficient. They emit a lot more light and a lot less heat and last a lot longer. a 23 watt cfl is equal to a 100 watt incandescent in light output.
If you pay 10 cents per kwh for electricity then a 100 watt bulb left on all the time will cost about $88 per year, multiply that by all the lights you leave on whereas a cfl of the same brightness would cost about 1/4 of that or around $22 per year
How does area of the circuit affect brightness of bulb?
if light is low it can cuase the bulb brightnees.
How many amps do light bulbs draw?
Depend on watt and voltage use of light bulbs. You can use this ohm's law formular to calculate the current draw on light bulbs. I (current in amp) = P (watt)/ E (voltage) If 25W light bulb use in 115V AC (resident home) then current draw will be: 25/115 = 0.22A or 22 miliamperes. Hope this help.
What electrical power do light bulbs use?
It doesn't 'USE' any; that is, you don't have to provide any electromagnetic waves in order for a light bulb to do its job.
In the course of doing its job, the light bulb PRODUCES light and heat waves.
A fluorescent light also produces radio waves.
Can you recycle xenon light bulbs?
Halogen light bulbs are a type of incandescent light bulbs and are filled with a halogen gas. The halogen gas gives the bulbs a longer life than traditional incandescent bulbs because it helps redeposit the evaporated tungsten back to the filament. Halogen light bulbs are not the same thing as compact fluorescent light bulbs (CFL bulbs), which have mercury inside and are often subject to state or local disposal regulations. Also, halogen light bulbs are not recyclable like CFL bulbs are.
