1. Energy - saving Issues Q: Which indoor lighting fixtures are more energy - efficient? A: LED lights consume less energy and have a longer lifespan, making them more energy - efficient than traditional lighting fixtures. 2. Installation Matters Q: Is there a weight limit for installing chandeliers? A: Yes. You need to confirm the load - bearing capacity of the ceiling, which generally should match the product manual. Reinforcement may be required if necessary. 19. Maintenance Q: How do I clean lighting fixtures? A: First, turn off the power. Wipe with a dry, soft cloth. For stubborn stains, you can use a slightly damp soft cloth, but avoid getting water inside the fixtures.