STRUCTURE OF Lled flood light

7 Important Things You Need to Know Before Buying LED Flood Light



My husband installed two 100W LED flood light in the front yard and the other the backyard. My son loves to play soccer and now he can do that even at night because the brightness of the led floodlight provides him the ability to play even during the night.   – Amazon customer – Adam


LED Flood lights are very popular because they can provide large quantities of bright light without using many LED bulbs. These high-intensity LED flood lights to have many uses and applications. Floodlights are valuable for lots of purposes, regardless of whether lighting a building, car park, garage, lawn, fountain, terrace, tennis court, tree, or yard. We can utilize them as a part of complement, task, or security lighting.

I have been selling LED flood lamps for two years, from 10w, 100w, 500w or even 1000w. Yes, you didn’t get it wrong, there is a 1000W led flood light outdoor. It weighs more than 50kg. Since the super high power generates a huge amount of heat, there are two fans inside each luminaire for auxiliary heat dissipation.

Its price also exceeds $1,000. Maybe I will write an article to introduce this high-power lighting fixture if you are interested. After all, we use  500w, 1000w lamps in high-illumination areas such as stadiums and football fields

500w led flood light

Ok, let’s get to the point. We mainly divide the structure of the floodlight fixture into 7 parts:

  1. Light Cover Lens
  2. Silicone Sealing Ring
  3. Light Source
  4. Reflector
  5. Driver
  6. Housing
  7. Installation Bracket

STRUCTURE OF Lled flood light


1. Light Cover Lens

pmma lens

Usually, the led manufacturer will choose PMMA or tempered glass shades depending on the cost. So what are the main differences between them?


MMA, known as inorganic glass. It is a thermoplastic with excellent light transmission. It is made of methyl methacrylate as a secondary base and takes part in the polymerization of initiators and plasticizers.

The biggest advantage of PMMA is his excellent light transmittance. The PMMA transmittance is 92~93%, which is the best in the transparent material. Thus, the multi-light guide plate and medical equipment are often used, and the PC is only 86~89%.

Secondly, it has excellent weather resistance and strong compliance with the natural environment. Even if exposed to sunlight for a long time, it will not change its function. High mechanical strength; weather resistance, corrosion resistance and insulation. It is his good processing function, suitable for both machining and thermoforming.

The defect of PMMA is that the texture is brittle and the appearance is not so hard. The scratch resistance of the surface is not as good as that of tempered glass.

Tempered Glass

It is a kind of prestressed glass. To improve the strength of the glass, chemical or physical methods are used to form compressive stress on the surface of the glass. When the glass is subjected to an external force, the surface stress is first offset, improving the bearing capacity and enhancing the wind resistance of the glass itself. Sex, cold and hot, shock.

The light transmission performance of tempered glass is better than that of PMMA. Besides, his high-temperature resistance is also better than PMMA. The quenching and rapid heat properties of tempered glass are 3 to 5 times higher than ordinary glass. Can withstand temperature difference changes of over 250 degrees, which has the obvious effect on preventing thermal cracking.

The tempered glass can no longer be cut and processed, and the glass can only be processed to the desired shape before tempering, and then tempered. Tempered glass has the possibility of self-explosion (self-rupture), while ordinary glass does not have the possibility of self-explosion.


2. Silicone Sealing Ring


Silicone seals are often an important guarantee of the waterproof performance of the luminaire. However, most sellers do not specify the material of the seal. When we have high requirements for waterproofing or when purchasing in bulk, it is an important step to buy a sample for testing. The main test is as follows:

  • Oil resistance
  • Wear resistance
  • Acid resistance
  • Alkali resistance
  • Weather resistance
  • Water resistance


3. Reflector

led Reflector

Reflectors are easier to implement and cost much less to manufacture. How well they collect and collimate the light depends on their shape. Sometimes they are also used with different finishes to add texture to the light or diffuse it. Often the physical size of light sources limit the optical options.

With chip-on board (COB) arrays or emitters, they emit such a large area that the only real solution is to surround them with a reflector.

We use reflectors in most incandescent lights, but with LEDs, there is one key disadvantage: the majority of light rays coming from the center of the emitter pass out of the system without even touching the reflector. This means that even with a narrow reflective system, a significant portion of the light strays wide of the target. This results in lost lumen output or creates an unwanted glare.


4. Light Source

The 2 most popular types of LED downlights are SMD (Surface Mount Diode) and COB (Chip on Board) downlights. They both produce high quality light, have high life expectancy and are extremely efficient.


SMDs are more efficient than COBs because the light source produces higher lumens per watt, which means that they produce more light with a lower wattage.

They produce a wider beam of light which is spread over a greater area. This means that less material is needed for the heat sink, which means that they are more economical. The manufacturing procedure to make them is more expensive as the SMD diodes (LED chips) are machine printed on a PCB board. Most domestic downlights use SMD LED’s.



A Chip On Board LED Downlight comprises a single LED chip, mounted on the downlight, compared to an array of LEDs like an SMD. As the single cluster of LED’s is mounted in one point, they require greater cooling, so a larger heat sink, usually made of aluminum, must be mounted to dissipate the heat. As more material is required to manufacture a COB LED heat sink, this usually increases the cost slightly.

COB led flood light


1.  Benefits of COB

COB downlights provide a better light source. It achieves a more focused light and with the use of reflectors, the light beam can be controlled. Chrome reflectors surrounding the diode can be replaced and set at different angles to make the light beam narrower or wider. Due to the narrow beam and with the use of reflectors that are usually clear, COB lights generate a crisper and cleaner as there is no frosting on the lenses. which cuts down the clarity of the LED light. Due to the clear lenses, more light can penetrate further which means they perform well in rooms with high ceilings.

2. Benefits of SMD

SMD downlights produce a wide spread of light. It floods light everywhere which in turn means there is a higher glare. Their wide beam angle means they are suitable for larger rooms like living rooms, bedrooms, kitchens and bathrooms.

5. Driver

led flood light driver

LED drivers are electrical devices that regulate the power that an LED or a string of LEDs is exposed to. It responds to the varying needs of an LED circuit by delivering a constant quantity of power to the LED while its electrical properties vary with temperature. LED drivers are self-contained power supplies that have outputs that match the electrical characteristics of the LED they power.

Good LED light driver has:

  • High Power factor
  • The driver that checks flicker

Bad LED light driver has a short lifespan and thus directly affect the lifespan of the LED.


6. Housing

led flood light shell

If you buy LED floodlights often, you find that most of the fixtures are Die-cast Aluminum. why? Here we need to understand the die casting technology.

Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity.

Aluminum die casting is that it creates lighter parts—with more surface finishing options than other die cast alloys. Aluminum can also withstand the highest operating temperatures of all the die-cast alloys. Cast aluminum is versatile, corrosion-resistant; it keeps high dimensional stability with thin walls and can be used in almost any industry

Aluminum can also withstand the highest operating temperatures of all the die-cast alloys. Moreover, cast aluminum is versatile, corrosion resistant; it keeps high dimensional stability with thin walls and can be used in almost any industry.

Therefore, the advantages of die-cast aluminum in LED lamp housings are:

  • Light weight
  • Corrosion resistance
  • High-temperature resistance
  • Fast heat dissipation
  • Strong stability


6. Installation Bracket

led adjustable bracket

All led flood light has 180 degrees Adjustable mental mounting bracket, flexible enough and easy to install, the light can be

  1. Ceiling-mounted
  2. Wall-mounted
  3. Ground-mounted

installation of led flood ligh


I hope that the above can help you select the high quality led flood light that suits you. So what other aspects do you think need attention? Or you don’t know how many LED fixtures do you need? Leave your comment, we can help you!

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