Omega Sea have taken their no-nonsense attitude toward making the highest quality of fish foods, and applied it to their 'Omega Star' line of top end metal halide bulbs. Offering both the new style HQI, and the standard mogul socket style metal halide in 6700K, 10000K, 14000K, and 20000K color temperatures with outputs ranging from 150-400 Watts. You won't be disappointed with the incredible response you will see from your livestock upon using an Omega Star metal halide bulb. For best results, replace your metal halide bulbs every 1-2 years. The use of a light meter will allow you to monitor the performance of your lighting, making it easier to decide when to replace your bulbs.