To design effective indoor light box advertisements in shopping malls, consider the following techniques: 1. Use high-resolution images and clear typography for visibility. 2. Align with the mall's branding and target audience. 3. Employ contrasting colors for visual appeal. 4. Utilize dynamic lighting effects. 5. Keep design simple and uncluttered. 6. Ensure readability from a distance. 7. Incorporate engaging visuals or motion graphics. 8. Test and optimize placement and visibility.