When choosing a light source for your backyard, pay attention to the following:

1. Focus on luminous flux, not wattage:

Wattage only represents power consumption and doesn't directly indicate brightness in the LED era.

Pay attention to the parameter "luminous flux" (unit: lumens LM). For example, a 100W traditional halogen lamp might only produce 1500 lumens, while a high-quality 20W LED light head can reach 2000 lumens. For backyard lighting, depending on the area and intended use, choose products ranging from 2000-5000 lumens.

2. Consider light distribution, not just the design: Observe the product description or ask the seller whether the light is evenly diffused or focused through a lens. A light head that forms a clear rectangular light spot provides far better illumination than one that merely "looks bright."

3. Consider materials and heat dissipation: Prioritize light heads made of "one-piece die-cast aluminum." They feel substantial, typically have a fine sandblasted or anodized surface, and clearly defined heat dissipation fins.

Avoid products with plastic or sheet metal casings, as these cannot effectively dissipate heat from the LEDs.

4. Consider Smart Features: Choose products with human body sensors and dimming functions based on your needs. These features greatly enhance the user experience and energy efficiency.

5. Match to the Overall System: The wattage of the light head needs to match the power output of the solar panel and the capacity of the battery. A high-wattage light head paired with a small-capacity battery may not last all night.

In conclusion, a modern solar-powered garden light head is an efficient, long-lasting, and intelligent optical system. If you have specific garden lighting needs (such as illuminating paths, enhancing the landscape, or providing security lighting), please let me know, and I can provide you with more specific advice.