I see, maybe a warm or a neutral white can help you better in foggy situation. Not so sure it'll meet your 100-150m requirements, but the TK20 has a slightly warmer neutral white tone and a tight hotspot. Haven't check out the E21 myself yet.
I have little experience in thick foggy situation, but if your eyes are night adapted, any type of light color, warm, neutral or cool white can blind you from the fog's reflection regardless, when switched on with more than 100 lumens. I read that warm has a better penetration because the light's spectrum does not disperse too much in the fog. There are not many warm LED throwers. Closest I can find and available is the TK20.
There’s a Quark Turbo 123^2 Warm White, but I don’t think that’s available anymore. You can check it out with Polkiuj.
Hobbies The Bright Side V4, Malaysian Flashaholic Community
Oct 5 2010, 05:23 PM
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