Can I safely use a 9w LED bulb in place of a 40w incandescent?



LONG ANSWER: The maximum wattage limits are largely a function of heat. For incandescent lights, more wattage means more heat. And too much of a heat buildup could result in shorter bulb life and even risk of fire, especially in a fixture in which the bulbs are fully enclosed.

While lighting has traditionally been sold by wattage, what you are really buying is the amount of light, actually measured in lumens. For years, wattage gave us a good idea of how much light came from a bulb. A 100 watt bulb was much brighter than a 40 watt, and a bit brighter than a 75 watt.

As different types of bulbs came into use, lumens started to be listed. For a given lumen level, LED bulbs draw much less wattage than an incandescent bulb. For example a 75 watt incandescent bulb gives off between 700 and 1100 lumens (depending on the type). But LED bulbs that give off about 900 to 1100 lumens only use between 9 and 15 watts. Since they are similar to a...

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Assuming you are talking about both being incandescent light bulbs, yes, both electrical wise (amount of current the connection of the lamp holder can safely carry) and heat emitted wise (incandescent light bulbs give out a lot of heat and the lamp holder needs to be able to dissipate the heat without letting the temperature of any part of the whole fixture exceed a level that's unsuitable for the material used for that particular part). This is because a 9W incandescent would use both less electrical current and also emit less heat. Obviously the voltage specified for the lamps must be the same, ie. 12V, 24V, 120V, 230V etc.

However as Malcolm says likely you're talking about a CFL lamp. If that's the case (9W CFL), then the answer is yes electrically and heat wise should be no issue too. But it may be a little tricky if you go up all the way to above 23W CFL, even though a 23W CFL uses less current as well as likely dissipate less heat than a 60W incandescent light bulb. The...

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Hi Sebastie, this is Mike with The Home Depot.

There seems to be a lot of confusion out there concerning cfl bulbs.

Let’s get some facts straight first. The lamps socket was designed for a standard incandescent bulb with a maximum wattage of 60 watts.

Thus the maximum wattage the lamp can handle safely is 60 watts. A 100 watt cfl bulb generates the lumens or light output of a 100 watt incandescent bulb but uses only 27 watts of power. Thus it may be used in the lamp.

Heat is another issue; cfls generate much less heat than an incandescent bulb. Thus a 100 watt cfl will be safe in the lamp based on the amount of heat it generates versus a 100 watt incandescent bulb, which would not be safe to use in the lamp.

The only other consideration is the bulbs size; make sure there is no contact with the lamp shade or other parts of the lamp.

As to the color temperature or kelvin rating. The kelvin rating indicates the color of the light.

A very high...

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LED Bulb

This product has been discontinued and removed from our shelves.

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LED and how it differs from incandescent bulbs and CFLs?

LED lighting is highly-efficient and most eco-friendly lighting source in the market; what’s more, it offers so many varieties to choose from. We are here presenting helpful guidelines to help you make the perfect choice.

For years, people have only one style of light bulb – the incandescent. Over the time, there was need of energy-efficient lighting, and CFL bulbs came onto the scene, as a cheaper, more energy-efficient lighting option.

One step ahead, now we have LEDs offering benefits like low energy usage, low heat emission, and low impact on the environment when discarded.

Do you know lighting accounts for 10%-30% of a typical household’s energy bill in India? So, this is right time to make change, and go for highly efficient lighting – LED – and save money, energy and also our environment.

There are many types of LED bulbs are available in the market today. So choice is...

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I've seen my fair share of LED bulbs, but usually the lumens they output are fairly modest. This bulb, however, outputs 308 lumens using 150 warm white LEDs, and is rated at 9 Watts.

This new LED bulbs are said to be a replacement for 70 Watt incandescent bulb. These LED bulbs are usually direction oriented compared to incandescents or compact Fluorescent lamps: Since there are number of LED bulbs in all directions, it will be able to disperse the lights in different directions. There is also a frosted version of the bulb shown below that assuresomnidirectional of lights. There is also 3-Dimension LED Bulbs that have different colors used for industries and home gardens. The price however is expensive costs about $60-$70 each for this LED Bulbs. Since they have low wattage requirement (9 Watts compared to 70 Watts), the costs will save itself in the long run with their long life bulbs.

Frosted Version: 150 LEDs light up omni-directionally, making this bulb great for large...

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The coveted Lighting "L" Prize last year went to an LED bulb that could replace a 60-W incandescent. Now comes an LED replacement for the 100-W incandescent light bulb.

GE Lighting developed the bulb in its East Cleveland, Ohio, LED lab. The new LED bulb consumes just 27 W and comes in a standard “A-19” bulb shape. GE says its Energy Smart 27-W LED bulb incorporates proprietary synthetic jet technology that was enabled by a collaboration with ecomagination Challenge winner Nuventix, creator of LED cooling technologies for energy-efficient lighting.

GE says the new bulb will be on store shelves in the U.S. and Canada the first half of 2013, but doesn't say how much its price tag will set consumers back.

GE already makes a 13-W LED (60-W incandescent replacement) and a 9-W LED (40-W incandescent replacement), which was the first incandescent-shaped (A-19) LED to earn Energy Star qualification. GE says it was tough to get the LED bulb down to a size equivalent to...

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