actinic isnt really a brand, its a spectrum, the blue end of the spectrum. 50/50 has half white/ half actinic spectrum. If your not going to have any coral you dont really NEED actinic as nothing in your tank needs the light. That being said I perfer a 50/50 light over a "daylight" bulb as I like the blueish color over a yellowish color. Its really personal preference.