Blue Dolphin 干湿两用砂纸（C-WT 纸全粗砂）- 9 x 11 张 5 包 - 240 粗砂

A1: Use 30–40 W for typical offices; opt for 50–72 W for brighter environments like workshops or retail.

A2: Yes—it’s designed for easy installation in standard recessed grid or drop ceilings.

A3: The 5000 K (daylight) option boosts alertness and is commonly recommended for offices and schools.

A4: Absolutely—we ship from Pineville, NC, typically within one business day. Or you can come pick up at our store located at 311 S Polk Street, Suite 50, Pineville, NC 28134.