1. Lumen output
Lumen is a standard unit of measurement for the brightness of a light source. It represents the total amount of visible light that the human eye can perceive. For LED floodlights, lumen output is a core indicator and is usually clearly listed in the product manual. After understanding the lumen output, you can choose according to the specific usage scenario. For example, commercial places such as parking lots or large warehouses may require up to thousands of lumens of lighting to ensure safety and visibility. On the other hand, places such as home courtyards, gardens or small driveways can choose lamps with lower lumens, usually between a few hundred and a thousand lumens, which can provide sufficient brightness without causing light pollution. After understanding the lumen output, you can also compare different brands and models according to your usage needs and choose the most suitable product.

2. Watt power
Watt is a unit that represents the power consumed by a lamp, but it can also be used to evaluate the energy efficiency of a lamp. By calculating the ratio of lumens to watts (luminous efficiency, Lumen per Watt), you can understand the efficiency of the lamp. High-efficiency lamps mean that they can emit more light while consuming the same amount of electricity, which not only improves the lighting effect but also reduces electricity bills in the long run. For example, modern high-efficiency LED floodlights usually have a light efficiency of 80 to 130 lumens per watt, which is much higher than traditional halogen or fluorescent lamps. When choosing, give priority to products with high light efficiency, which can achieve better lighting effects while saving energy. By comparing the wattage and lumen output of different products, you can make more informed choices and optimize your lighting solution.

3. Color temperature (Kelvin)
Color temperature is a standard for describing the color of a light source, measured in Kelvin (K). Different color temperatures affect the perception and use of light. Low color temperatures (such as 2700K to 3000K) present a warm yellow color and are often used in home and commercial environments to create a comfortable and relaxing atmosphere. In contrast, high color temperatures (such as 5000K and above) present a cool white color and are suitable for environments that require high brightness and clarity, such as hospitals, factories or outdoor workplaces. When evaluating the brightness of LED floodlights, the choice of color temperature is also crucial. Choosing a color temperature that is suitable for the scene can improve the user experience and ensure the functionality of the environment. For example, high color temperature lamps are usually selected in outdoor stadiums or construction sites to provide clearer views and stronger contrast at night.

4. Illumination range and angle
The beam angle of LED floodlights has a direct impact on the lighting effect. The beam angle determines the degree of diffusion of light. Smaller beam angles (such as 30 degrees) usually produce more concentrated and intense beams, which are suitable for specific lighting needs, such as focusing on an area or target. Larger beam angles (such as 120 degrees) are suitable for illuminating a wider area, such as comprehensive lighting of a courtyard or large venue. When selecting a lamp, it is important to consider the beam angle to ensure that it meets the needs of a specific environment. The installation height and the expected lighting area will also affect the selected beam angle. Ideally, field tests should be conducted to observe the effects of lamps at different angles in actual lighting to select the most suitable product.

5. Illumination uniformity
Illumination uniformity refers to the uniformity of light distribution, which is critical to avoiding glare and shadows. Uniform lighting can improve safety and reduce the possibility of accidents. In practical applications, a lux meter can be used to measure light intensity at different locations to evaluate whether the light distribution is uniform. Too much brightness concentrated at a certain point may cause discomfort and affect visual comfort. The ideal LED floodlight should provide sufficient lighting in key areas while avoiding too strong or too weak light. Choosing lamps with good light distribution characteristics can ensure the best lighting effect in most cases, especially in outdoor and public places. Good lighting uniformity is a key factor to ensure safety and comfort.

6. Test and compare
When choosing LED floodlights, conduct field tests as much as possible to observe their actual effects. This means comparing lamps of different brands and models under similar conditions to evaluate their performance in terms of brightness, light efficiency and color temperature. Through actual experience, you can more intuitively judge which product is most suitable for your needs. In some cases, you may find that some lamps are superior in specifications, but the actual performance is not satisfactory. Field testing provides a reliable way to ensure that the selected lamps not only meet the technical requirements, but also show excellent performance in actual use.