Diving Light
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Underwater Kinetics C4 Xenon Diving lights |
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Dive the 6.6 watt C4 with long lasting disposable alkaline C-size batteries in remote locations where there is no electricity. The long shelf life of alkalines will insure the light is ready when you need it in an emergency... |
Diving Light
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 Hollis H 160 Dive Propulsion Vehicle No HID LED Light  US $3,949.98
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 TILLY TEC CANISTER WARP 10 Dive Light 9 DIR SCUBA TECH US $2,369.00
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 Keldan Tec 36 Li Ion Dive Light Torch Battery Canister US $1,596.99
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 Bonica Dive HD 1080p Camera Housing Light Lens Bag US $1,495.00
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 Keldan Luna 8 BS H 1400 lumen HID Dive Light Torch US $1,443.99
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 Cressi Travel Light BCD Scuba Diving Equipments Large US $1,399.00
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 Cressi Travel Light Dive BC Computer Scuba Set X Small US $1,399.00
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 Cressi Light Jac BC Scuba Dive Equipment Set X Large US $1,399.00
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 Cressi Light Jac BCD Scuba Supply Dive Package Large US $1,399.00
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 Keldan Tec 24 Li Ion Dive Light Torch Battery Canister US $1,307.99
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 Keldan Luna 4 BS H 1400 lumen HID Dive Light Torch US $1,299.99
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 TILLY TEC CANISTER DIVE LIGHT TECH WRECK TT1 HID 45 US $1,259.00
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 HOLLIS 16W LED CAVE WRECK TEC SCUBA DIVE LIGHT DIR GUE US $1,199.00
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 Bonica Dive HDDV 1080p Camera Housing Light and Bag US $1,099.00
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 Keldan Dive Light Batteries TEC 36 US $920.99
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 SCUBAPRO Hartenberger U W Underwater Dive Light US $825.00
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 Nocturnal Lights TLX 800t Technical Canister Dive Light US $799.99
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 Dive Rite LED LUX 900 Lumen Scuba Diving Canister Light US $799.00
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 BIG BLUE TL 6 CAVE WRECK TEC SCUBA DIVE LIGHT DIR GUE US $779.99
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 BigBlue 1300 Lumens Technical Diving Canister LED Light US $769.00
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 Dive Rite LT6250 HID1000 1000 Lumen Slimline HID Light US $749.99
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 7XRE 35 Watt LED Dive Light 5 hours of burn US $749.00
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 TILLY TEC CANISTER DIVE LIGHT TECH WRECK GREEN FORCE T1 US $715.00
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 TILLY TEC CANISTER DIVE LIGHT TECH WRECK GREEN FORCE T2 US $715.00
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 BIG BLUE TL 3 CAVE WRECK TEC SCUBA DIVE LIGHT DIR GUE US $709.99
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 BIG BLUE TL 1 CAVE WRECK TEC SCUBA DIVE LIGHT DIR GUE US $699.99
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 Keldan Dive Light Batteries TEC 24 canister US $647.99
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 4 LED Newest Genaration Dive Light by L4M 21 Watt HID US $599.00
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 Dive Rite LED LUX Canister Light US $549.00
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 Nocturnal Lights SLX 800xt Dive Light US $499.99
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 Dive Rite 500 LED Primary Dive Light Complete Package US $499.00
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 Keldan Dive Light Batteries Solaris US $483.99
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 Keldan Dive Light Batteries SolarisPro TEC 12 US $478.99
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 Nocturnal Lights SLX 800t LED Dive Light Goodman Handle US $474.99
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 Nocturnal Lights SLX 800t LED Dive Light Handle US $474.99
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 Salvo Rebel 9 watt LED Handheld Primary Dive Light New US $449.99
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 Nocturnal Lights SLX 800t LED Dive Light Hand Mount US $424.99
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 Nocturnal Lights SLX 800t LED Dive Light Hand Mount US $424.99
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 SLX 800t LED Nocturnal Dive Light with hand mount US $419.00
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 Nocturnal Lights demo used SLX 800t LED Dive Light US $399.99
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 Nocturnal Lights SLX 800t LED Dive Light US $399.99
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 Underwater Kinetics AquaSun LED Rechargeable Dive Light US $399.99
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 Cressi Light Jac BCD Scuba Diving Gear BC Jacket Small US $399.95
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 Cressi Travelight BC Travel Light BCD Dive Jacket Large US $399.95
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 Cressi Light Jac BCD Scuba Dive Gear BC Jacket X Small US $399.95
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 BigBlue 1000 Lumens 30W Handheld LED Scuba Diving Light US $399.00
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 SLX 800t LED Nocturnal Dive Video focus Light 800 lumen US $399.00
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 Nocturnal Lights SL50 Rechargeable Dive Light US $395.00
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Why would inhaling pure oxygen cause someone to suffer from light headedness?
For example, when Scuba Divers dive, they use tanks that contain a gas mixture much like air. If they used tanks that contained pure oxygen, they could suffer light headedness. Explain why inhaling pure oxygen gas might cause light headedness (2 marks).
Actually...divers use an atmospheric mix for a simple reason...and it has nothing to do with lightheadedness...
Oxygen is LETHAL at high concentrations at different partial pressures. If a diver were to dive to much over 120 feet on a standard atmospheric mix, they would be risking Oxygen Toxicity. Deep dives have to use a special mix that includes helium to prevent the O2 we need from killing us.
Besides, if we breathed 100% oxygen on a dive, we'd loose the reflex to exhale. Carbon Dioxide in the air helps trigger the body's breathing reflex. In a 100% oxygen atmosphere, a human would have to conciously force him/herself to exhale and inhale until the CO2 levels in the blood started reaching near lethal levels.
By the way...if you're trying to sneak-in exam/study questions, it's usually a good idea to remove the scoring value! 
Good Luck!