The Anatomy of a LED Light Bulb
- Lens/Optics. Due to the brightness of LEDs, a lens (or optics when used on omni-directional lamps) is used to evenly distribute the light.
- LED Chips. LED chips are the components that create the light. ...
- Heat Sink. The heat sink is the piece of metal the LED chips sit on. ...
- Circuit Board/Driver. ...
- Housing. ...
- Base. ...
What are the disadvantages of LED light bulbs?
What are the pros and cons of LED?
- The Pros and Cons of LED Lights. July 10, 2020. …
- Pro: Long Lifespan. An LED light bulb has the longest lifespan of all the bulb options. …
- Con: An Upfront Investment Is Required. …
- Pro: Energy-Efficient. …
- Con: Not Great for Dimmers. …
- Pro: Produce Less Heat. …
- Con: They Can Fail Under Heat. …
- Pro: Environmentally Friendly.
Which led bulb is best?
Best Sellers in LED Bulbs. #1. SYLVANIA ECO LED B10 Light Bulb, 40W=4.5W, 7 Year, 300 Lumens, Non-Dimmable, Clear, 2700K, Soft White - 6 Pack (40878) 4.7 out of 5 stars. 17,321.
What is the best LED light?
- BEST OVERALL: hykolity Flush Mount LED Ceiling Light Fixture
- RUNNER UP: LIT-PaTH LED Flush Mount Ceiling Lighting Fixture
- BEST BRIGHTNESS: Lighting EVER Flush Mount Ceiling Light Fixture
- BEST IN TECH: TALOYA Smart Ceiling Light
- BEST PENDANT: Artika Essence Chrome 1-Pendant LED Light Fixture
- BEST RECESSED: Ensenior 12 Pack LED Recessed Ceiling Light
What are the best light bulbs?
What to Consider When Choosing the Best LED Light Bulbs
- Bulb Shape and Compatibility. There are countless different light bulb shapes, but the ones most commonly used for residential purposes are A-series, E-series, G-series/globe, and Edison bulbs.
- Lifespan and Operation Costs. ...
- Smart Technology. ...
- Additional Features. ...
What is the chip in the Ever LED bulb?
The chip powering the Home EVER LED bulb is basically a constant current source powering an onboard MOSFET. The reference circuit from chip-maker Bright Power Semiconductor is close to what we found on the PCB.
How many LED bulbs are equivalent to 60W?
We came to this conclusion after tearing down five LED bulbs marketed as equivalents for 60-W incandescent bulbs. The five bulbs we chose all got high marks from Consumer Reports Magazine. But that’s where the commonality stopped. When we got inside, we found vastly different approaches in construction techniques, thermal management and electronics design.
Why do Osram bulbs need a pot?
For reasons that are not completely clear, the designers of the Osram bulb chose to pot the ac/dc converter board. The relatively small heat sink in this board, compared to other designs we’ve seen, might indicate the potting is meant to improve thermal dissipation, though potting material doesn’t completely fill the empty space between the electronic components and the external shell. The potting did, however, complicate the process of deciphering the circuit.
What is the main board for Osram LED?
The main board for the Osram LED bulb is two sided. It contains two ICs, one a diode bridge for the ac input, the other an SSL21082AT driver IC from NXP Semiconductors. Features implemented on the NXP chip include dimming, over-temperature protection and LED over-temperature control, output short protection, and a restart mode in the event of a brown out. This IC has an integrated internal HV switch and work as a boundary conduction mode (BCM) buck converter.
What are non-SMD components?
The only non-SMD components are two big capacitors, a surge resistor on the input and a transformer. Connections from the board to the screw-base and to the LED board are through discrete wires, but the connection to the bulb foot contact was done by machine.
Why is there no heat sink on Philips LED bulbs?
The Philips LED bulb had no heat sink other than the two-sided plate holding the LEDs. One reason: temperature compensation. The NTC resistor is visible on this shot of the LED plate.
How many diodes are on a home ever PCB?
A view of the Home EVER PCB reveals the four diodes making up the rectifying bridge and the BP2812 chip (bottom). The other side of the board (top) holds the energy handling components and the fusistor on the input.
What happens when a light bulb is turned off?
This explains why, when the bulb is turned off, it continues to glow for a period of time.
Do fluorescent bulbs need reflectors?
Unlike fluorescent tubes, these bulbs direct all their light forward and do not require reflectors. Better still, their shape allows them to be packed very close together producing much higher levels of illumination.
What color LED light bulb is used?
Common LED colors include amber, red, green, and blue.
What color is LED light?
Common LED colors include amber, red, green, and blue. To produce white light, different color LEDs are combined or covered with a phosphor material that converts the color of the light to a familiar “white” light used in homes. Phosphor is a yellowish material that covers some LEDs.
Why should I choose ENERGY STAR certified LED lighting products?
There are more lighting options available today than ever before. Despite that, ENERGY STAR is still the simple choice to save on your utility bills.
How does an incandescent bulb work?
Learn more about CFLs. Incandescent bulbs produce light using electricity to heat a metal filament until it becomes “white” hot or is said to incandesce. As a result, incandescent bulbs release 90% of their energy as heat.
Why are LED lights so efficient?
When designed well, LED lighting is more efficient, versatile, and lasts longer. LEDs are “directional” light sources, which means they emit light in a specific direction, unlike incandescent and CFL, which emit light and heat in all directions. That means LEDs are able to use light and energy more efficiently in a multitude of applications.
What is LED heat sink?
LED products use a variety of unique heat sink designs and configurations to manage heat. Today, advancements in materials have allowed manufacturers to design LED bulbs that match the shapes and sizes of traditional incandescent bulbs. Regardless of the heat sink design, all LED products that have earned the ENERGY STAR have been tested to ensure that they properly manage the heat so that the light output is properly maintained through the end of its rated life.
Why do LEDs use heat sinks?
LEDs use heat sinks to absorb the heat produced by the LED and dissipate it into the surrounding environment. This keeps LEDs from overheating and burning out. Thermal management is generally the single most important factor in the successful performance of an LED over its lifetime.
