... good color rendering index.2. Saving 80% energy than incandescent bulbs.3. lumens of a 5W energy lamp equals to that of a ... center intensity, 2 times higher than normal spiral lamp, about 6 times higher than U shape lamp5. Luminous efficacy 5% higher than ... ApplicationHome, Offices, Shops, Department Stores, Clubs, Restaurants, Hotels, Supermarkets half spiral shape energy saving bulb 5w -15w 6500k