The Luminus SBT90.2 is a second generation of the SBT90 LED and can output over 6000 lumens with a focused beam, great for long distance throw.
Tag Archives: reference
Hanklights! A brief overview of Intl-Outdoor’s Emisar and Noctigon flashlights
Flashlights from Intl-Outdoor are very highly regarded on Budget Light Forum and r/flashlight. They’re made by a friendly guy called Hank and you can only buy them on his website. There’s even a special r/hanklights. These lights can all be ordered in many different configurations, with different drivers and LEDs. Although there’s only 10 flashlight …
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Astrolux flashlights: the ultimate guide and comparison (with discount codes)
Astrolux have a wide range of flashlights, from small keychain lights to massive search lights. Here’s my comprehensive guide and take on their lights.
Convoy flashlight naming guide
Convoy have a whole load of flashlights, all with confusingly similar names. Convoy sell their flashlights on the Convoy AliExpress Store, Banggood and Nealsgadgets but there’s so many that it’s impossible to work out which one is which. Here’s a rough overview of the main ones. This isn’t going to be fully comprehensive but should …
From top to bottom, a flashlight is normally made of these parts: 1. Bezel2. Lens3. Reflector (or TIR)4. LED5. MCPCB (board the LED is soldered to)6. Metal heat sink (shelf or pill)7. Driver (makes the LED get the right current and voltage)8. Cell9. Tail cap 1-7 are contained within the head. Number 6 is where …
Measuring lumens without an integrating sphere or calibration source
Some people were asking how to measure lumens without much equipment. I’d recommend making a cheap integrating sphere (or tube) but you can get a rough idea of lumens with just a phone and desk lamp. Get the ceiling bounce app if you have an Android. Or search the app store for something like lux …
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Osram White Flat LEDs: W1, W2, Boost HL, Boost HX
Osram have a few different emitters that they use in flashlights, mainly for high throw. People refer to them in different ways, normally as White Flat. This post aims to clear up the naming and also help me remember which one is which. Bits of the information are based on this long thread on BLF, …
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Converting Candela to Throw
Multiply the candela by 4, then square root it to get the throw in meters.
Or square the throw in meters then divide by 4 to get the candela.