The brightness of LED panel ceiling lights is determined by their wattage and lumen output. In general, a higher wattage and higher lumens count will result in a brighter light. The color temperature is not a direct indication of brightness. The CCT, or Kelvins, refers to the visual appearance of the light in terms of color. Typically ranging from 3000K to 5000K, the color temperature can produce a warmer, cozier feel at 4000K (best for residential spaces), while 5000K produces cooler, whiter light more akin to daylight (better suited for outdoor areas and workshops). When choosing a bright LED panel light, it's essential to consider not only the brightness but also the quality of the light and its suitability for the intended space. Some areas may benefit from softer, warmer light, while others require cooler light.