LED ceiling lamps with a diameter of about 200mm are generally suitable for use in walkways and bathrooms, while those with a diameter of 400mm should be installed on the top of rooms no less than 16m2. LED ceiling lamps on the market are commonly D-shaped tube and annular tube, and there are differences between large and small tubes. When purchasing LED ceiling lamp, you should look three times. First, check whether the product identifications are complete. The identifications of regular products are usually standardized. The identifications should include trademark and factory name, product model and specification, rated voltage, rated frequency, and rated power. II. Check whether the power line of the lamp has CCC safety certification mark, and the sectional area of the external wire should be ≥ 0.75mm ²。 Third, check whether the electrified body of the lamp is exposed. After the light source is installed in the lamp holder, the finger should not touch the electrified metal lamp holder.
