LM 21 watt LED is a great primary light.
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Have you used a can light? Do you dive in poor vis? If so once you go can light you could never go back. In fact I hate diving with people that don't use a can light, since there are so many benefits to all parties having a bright light.second the intova for night diving, I wouldn't goto a can light unless you were doing wreck/cave diving personally. I use the intova ultras for most open water stuff and when paired with a light sock they do a great job.