TekTite lights and strobes are good quality products.
The TekTite Mark Lite is not a strobe, it is a constant on glow light that could be used instead of a chemical light stick to attach to your tank so your buddy can pick you out of a group of other divers. Your dive light is brighter.
If you want something to use on the surface within sight of the dive boat to show where you are, your dive light will do.
If you want a strobe you can leave on the anchor so you can find it later, get one of the low end TekTite strobes.
If you want something to use if
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STROBES
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Pocket-Size Emergency Strobe Beacon
The
This is what I was looking at. Thanks for the info though.