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As you can see in the subforum discussions, the selection of lights is very much like the selection of regulators - there are 'levels' of performance and expense, various posters have strong opinions about brand and model based on what they use or have used in the past, and it is hard to answer a question regarding the 'best' light - there are many very good lights out there. You can spend $60 - $130 and get a lot of light functionality. You can also spend less and get something that will make do for the course (look at some of the small Princeton Tec back-up lights). And, if you become enthralled with night diving, you can spend a LOT of money (~$500) and get some great, compact lights.I am about to engage in a night dive cert course and was looking on the web to find out which light would best fit my recreational intentions with diving. . . . Clear water, mostly.