The Aqualine T5 Reef White 10K lamp is a bright white lamp with a color temperature of 10000K. The lamp simulates tropical sunlight and is considered the ideal primary lighting for marine tanks as well as freshwater tanks. For saltwater tanks, we recommend combining the Aqualine T5 Reef White 10K with the Aqualine T5 Reef Blue to increase the blue spectrum, while for freshwater, combining the Aqualine T5 Reef White 10K with the Aqualine T5 Plant Grow will enhance plant growth. Aqualine T5 Reef White 15K 54W - 115 cm - 60 kWh/1000 hours Aqualine T5 Reef White 15K 39W - 85 cm - 44 kWh/1000 hours Aqualine T5 Reef Blue 80W - 145 cm - 85 kWh/1000 hours Length :- 39W - 85 cm 54W - 115 cm 80W - 145 cm