1. Emergency Functionality

    **Emergency Duration**: High-quality bulbs should be able to provide continuous lighting for at least 90 minutes after a power outage. MILANLUX emergency bulbs typically offer 3-6 hours of emergency lighting.

    **Switching Speed**: The bulb should quickly switch to emergency mode after a power outage, usually within 1 second.

    **Charging Time**: High-quality bulbs have short charging times, typically not exceeding 24 hours. MILANLUX emergency bulbs usually charge in 6-10 hours

2. Battery Performance

    **Battery Type**: High-quality bulbs often use lithium batteries, which have a long lifespan and stable performance.

   **Battery Lifespan**: The battery should support multiple charge-discharge cycles, with a lifespan of 1-2 years or more. MILANLUX typically uses lithium batteries that last up to 2 years.

3. Heat Dissipation Performance

   High-quality bulbs have excellent heat dissipation designs, often using materials like aluminum alloy to ensure they do not overheat during prolonged use. Some MILANLUX products use high-temperature-resistant premium plastics, offering both cost-effectiveness and good heat dissipation.

 4. Durability and Lifespan

    **Lifespan**: High-quality LED bulbs should have a lifespan of over 15,000 hours.

    **Durability**: The housing should be sturdy and offer dustproof and waterproof features (IP rating).