Bright Ideas

A quick overview of current flashlight technology.

Transcript

1. BRIGHT IDEAS Tuesday, 3 April, 12
2. Tuesday, 3 April, 12
3. vs. CANDLEPOWER LUMENS Tuesday, 3 April, 12
4. CANDLEPOWER • The amount of light produced by one 2.6oz pure spermaceti candle burning at a rate of 120 grains per hour. • Huh? • Measures intensity at the source. Tuesday, 3 April, 12
5. LUMENS • A 1 candela source emits 1 lumen per steradian in all directions isotropically. • 1 lumen is the amount of light in 1 sf area 1 foot away from a candle. • Huh? • Accounts for distance and beam angle. Tuesday, 3 April, 12
6. ONE MORE TIME? Tuesday, 3 April, 12
7. ONE MORE TIME? • A sliver of sunlight peaks through closed curtains in a dark room. Tuesday, 3 April, 12
8. ONE MORE TIME? • A sliver of sunlight peaks through closed curtains in a dark room. • That sliver is insanely bright but it won’t light up the room. Tuesday, 3 April, 12
9. ONE MORE TIME? • A sliver of sunlight peaks through closed curtains in a dark room. • That sliver is insanely bright but it won’t light up the room. • High candlepower. Low lumens. Tuesday, 3 April, 12
10. Tuesday, 3 April, 12
11. vs. THROW SPILL Tuesday, 3 April, 12
12. Tuesday, 3 April, 12
13. • High intensity = more throw and spill • Bigger reflector = more throw • Deeper reflector = more throw • Textured reflector = smooth transition • High-end LED = nice mix BEAM FACTORS Tuesday, 3 April, 12
14. Tuesday, 3 April, 12
15. vs. ICAN LED Tuesday, 3 April, 12
16. INCANDESCENT tungsten filament in a gas-filled bulb Cost Throw Colour Fragile Inefficient Lifespan Unregulated 3D = 75 lumens Tuesday, 3 April, 12
17. LED light emitting diode (electronic) Shockproof Efficient 50,000 hours Regulated output 2AA = 30-180 lumens Cost Colour Tuesday, 3 April, 12
18. HID High intensity discharge Shock resistant Throw & Intensity Bulky & Heavy Expensive Ballast & huge battery Needs to warm up All spot - No spill Tuesday, 3 April, 12
19. LED’S ARE ONLY GOOD CLOSE UP Tuesday, 3 April, 12
20. OLIGHT SR90 2300 LUMENS Tuesday, 3 April, 12
21. OLIGHT SR90 2300 LUMENS Tuesday, 3 April, 12
22. OLIGHT SR90 2300 LUMENS Tuesday, 3 April, 12
23. OLIGHT SR90 2300 LUMENS Tuesday, 3 April, 12
24. WHAT ELSE? Tuesday, 3 April, 12
25. • Lower °Kelvin = Warmer (more yellow) • ICAN = Warm (yellow ~ 2700°K) • LED = Cool (blue ~ 5000°K) COLOUR TEMP Tuesday, 3 April, 12
26. ENVIRONMENT • Batteries don’t like cold • Electronics don’t like water • Emitters don’t like high heat • Nothing likes high impact Tuesday, 3 April, 12
27. BATTERIES • Alkaline. Lithium. NiMH. • Cost • Voltage • Logistics • Self-discharge • Cold weather • Rechargeable Tuesday, 3 April, 12
28. ENELOOPS •1500 charging cycles •75% charge after 3 years of storage •Operating temp down to -20°C Tuesday, 3 April, 12
29. MAINTENANCE 1. Tighten 2. Clean (alcohol & q-tips) 3. Lubricate (no petroleum) 4. Lock-out Tuesday, 3 April, 12
30. WHAT’S IT GONNA COST ME? Tuesday, 3 April, 12
31. Fenix TK41 $145 • 800 lumens (2hrs) • 335 lumens (7hrs) • 108 lumens (27hrs) • 470 meter throw • 1.2 meter impact • IPX-8 2 meter Fenix LD40 $80 • 248 lumens (3hrs) • 110 lumens (9hrs) • 43 lumens (27hrs) • 207 meter throw • 1.5 meter impact • IPX-8 2 meter Fenix LD20 $68 • 180 lumens (2hrs) • 81 lumens (6hrs) • 30 lumens (15hrs) • 110 meter throw • 1.5 meter impact • IPX-8 2 meter Tuesday, 3 April, 12
32. OUCH! Tuesday, 3 April, 12
33. Garrison Noma Cree $25 • Cree emitter • 3XAAA • 140 lumens (2.5hrs) • 145 meter throw • “Impact resistant” • “Water resistant” Filzer I-Beam $29 • Luxeon emitter • 2XAA • 100 lumens (8hrs) • throw ??? • Impact??? • “Water resistant” Techlite (Price Club) 3 for $25 • Cree emitter • 3XAAA • 160 lumens (1hr) • 100 meter throw • 1.0 meter impact • “Water resistant” Tuesday, 3 April, 12
34. QUESTIONS? Tuesday, 3 April, 12