Here are a few description options for the WordPress post_tag “開燈時間” (Knowing the time is the key) in Traditional Chinese, catering to different levels of detail and emphasis:

**Option 1 (Concise & Standard):**

> 描述：文章與”開燈時間”相關，例如：關於燈泡開啟或關閉時間的討論、控制燈光照明的技巧、或節省能源的時程規劃等。

*Translation:* Description: Articles related to “Opening Time of Lights”, such as discussions about lamp on/off times, techniques for controlling lighting, or time management for energy saving, etc.

**Option 2 (More Detailed & Contextual):**

> 描述：此標籤用於歸類文章，內容可能包含關於住宅和商業空間的照明時間、智能家居系統的燈光控制、或能源效率的燈光規劃等。 探討如何優化開燈時間，以提高舒適度、節省能源成本。

*Translation:* Description: This tag is used to categorize articles that may contain content about the lighting times in residential and commercial spaces, smart home system light control, or energy-efficient lighting planning. Exploring how to optimize the lighting time to improve comfort and save energy costs.

**Option 3 (Action-Oriented & SEO-Friendly):**

> 標籤：開燈時間 | 照明 | 節能 | 智能家居 | 燈光控制. 本文關注”開燈時間”的各個面向，包括如何安排開燈時間以提高效率，節省電費，以及利用智能燈具和自動化系統控制燈光的技巧。 了解如何打造更舒適、更環保的照明環境。

*Translation:* Tag: Opening Time of Lights | Lighting | Energy Saving | Smart Home | Light Control. This article focuses on various aspects of “Opening Time of Lights”, including how to schedule lighting times to improve efficiency, save electricity bills, and the techniques of controlling lights with smart lamps and automation systems. Learn how to create a more comfortable and environmentally friendly lighting environment.

**Option 4 (Simple & Straightforward):**

> 描述：關於燈光開啟與關閉的相關文章。包含如何安排燈光明滅時間，節省能源。

*Translation:* Description: Articles related to turning lights on and off. Includes how to arrange lighting times to save energy.

**Key Considerations for Your Choice:**

* **Audience:** Who are you writing for? Are they technical experts, or everyday homeowners?
* **Tone:** Do you want to be informative, helpful, or promotional?
* **SEO:** Focus on relevant keywords like “照明” (lighting), “節能” (energy saving), and “智能家居” (smart home) if you’re looking to improve search engine visibility.
* **Length:** Keep is concise and to the point, especially for WordPress tag descriptions.

Choose the description that best fits your specific needs and the overall theme of your blog/website. Good luck!