Delta Flashlight Special Edition

$475.00

Welcome to the new Promethean's list! This year we are launching more special editions of various products on a regular basis. Delta Special Edition lights are fully assembled and ready to ship with our most popular options installed.

Notes on this drop: Happy May the Fourth! Meet the Delta Spathi: A fully modular Delta that can convert between 18350 and 18650 batteries. The body is made from 3 separate sections. Simply remove one of the end-sections to convert to 18350. The center section is always required, but you can swap out either end section and customize the appearance to your liking. Eventually we plan to launch different style body tubes, heads, and tailcaps so you can lego your own look.

This Spathi is bead blasted and then buffed out on the high spots. We always nickel plate aluminum, but it just didn't look "right" in this application, so we are going raw! Over time this will also allow for developing a more worn-in look that's appropriate to the canon.

You MUST NOT (EVER) use 2x18350 batteries in series. This will destroy the driver and possibly cause a fire and/or explosion !!!

Pre-Installed Options & included items

Light comes with all 3 body sections for 18650 or 18350 compatibility
Glow Board
Black rubber tailcap
3x Nichia 519A 9080 LED: 90+ CRI @4000K (~900 lumens)
Narrow optic
Xtar MC1 Charger (USB A/C)
1x18650 and 1x18350 battery
Small Nano Oil and spare o-rings

ATTENTION: These lights are not replaceable in the event they are lost or stolen. Given the time of year, we highly (highly) recommend accepting the Route insurance option during checkout. Did I say highly? We also recommend FedEx for high-value shipments. Signature confirmation will automatically be applied to all shipments. Better safe than sorry ;)

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Finish

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Product Overview

1x18350
1x18650

Nichia 519A

~900

0.5 hr

90 hr

You MUST NOT (EVER) use 2x18350 batteries in series. This will destroy the driver and possibly cause a fire and/or explosion !!!

SPECIAL EDITIONS: FIRST COME, FIRST SERVED These lights are our opportunity to play around a little bit. The selection always changes and we may (or may not) ever produce a specific combination again. These unique, and typically one of a kind, lights go up for sale here. Sign up on the Blue Label wait list and you'll receive an email when we stock Blue Label lights. We generally have a drop every month, and they go fast!

The Delta is our newest light and boasts more power than an Alpha (thanks to the triple LED) in a smaller package. I held off making an 18350 triple for years. It became the format de jour and seemed like the segment was too crowded. However, you dear customers are persistent and I caved. Of course I couldn't just make "another" 18350 light, so I created the Delta to set the standard for the category.

Battery type is IMR 18350 ONLY. Standard lithium ion batteries (non-IMR chemistry) in any size CANNOT handle the 3.4A current drain. Using these batteries are DANGEROUS.

Prometheus In the Wild

Product Details

Launched in 2018, I took my previous 7 years of flashlight design and manufacturing experience and crammed it into the Delta flashlight. It inherits everything that is legendary about the Alpha, and delivers it in a smaller EDC package.

I wanted to create something special, and I leaned heavily on engineering (not fads) to accomplish that. The exposed fins on the solid copper pill transfer heat directly to your hand and the environment instead of trapping it inside the light. This also allowed me to use 6/4 titanium (on titanium lights) without paying the performance penalty characterized by the poor thermal conductivity of titanium alloy. The Delta was also our first light to use a graphite thermal pad that is now standard on all Alphas and Deltas. User swappable optics also makes the Delta much more customizable.

You can't have everything though. The 18350 battery is 1/3 the capacity of the Alpha (18650) battery. You get the same performance but at the expense of reduced run time. However, if you select the Journeyman or Master package, you get two batteries so you aren't left in the dark. The Delta is a pocketable EDC light where the Alpha is a (just) pocketable workhorse.

Ergonomics

Deltas are slightly longer than many other 18350 lights and this is 100% intentional. The length of the Delta is "right-size," meaning it's intended to fully fill the average hand. This means you can properly access the tailcap button, and you won't be "masking" the front of the light and blocking the beam when you operate the light...which happens with lights that are too short.

Transparency

I tell you everything there is to know about my lights. I hate it when companies are vague. To me this says they are hiding deficiencies or don't know what they are doing. I'm a researcher and a fiend for data. I want to know as much about a product as I can, before I buy it. My "secret sauce" is solid engineering, the best components I can get, and old fashioned hard work. That's also why my lights are expensive. I show you everything so you can see that I haven't cut any corners. Each Blue-Label light comes with it's own report card so you know exactly what you are spending your money on. Ready-Made lights do not.

Fluorosilcone O-rings

Blue-Label lights feature blue fluorosilicone o-rings that are 10x more expensive that the industry standard Nitrile o-rings. Fluorosilicone is impervious to a wide variety of chemicals and has an unlimited shelf life, meaning they will never dry out and crack.

TIR Optics

TIR stands for Total Internal Reflection. These optics are extremely efficient at getting lumens out the front of the light. The Delta's TIR optics are user swappable so you can customize the light to suit your mission.

Beam Profile

Carclo TIR optics provide very smooth beam profiles that work well with a range of LEDs. TIR tends to produce more separation between the spot and spill than traditional reflectors. My personal choice is the Medium angle optic.

Premium LEDs

This is the most common place for flashlight manufacturers to skimp, but for me, this is where I spend most of my money. I only purchase LED's from a authorized US dealers or direct from the manufacturer. No grey-market or sketchy imports. I specify exact bins and I want to be absolutely sure that's what I'm getting. If you aren't buying direct there is no way to know what you're buying.

Glow Board

You may choose to include a glow insert around the LEDs. This insert is made from the highest quality glow material (strontium aluminate) and is manufactured in-house via laser cutting and manual machining. It's bright enough to be used as it's own light source for several minutes (in total darkness) after being charged by running the light on 100% power for a few seconds. It also acts as a locator so you can find your light in the dark.

Thread Quality & Machining

Thread fit is one thing that sets Prometheus apart. My threads adhere strictly to Unified Tread Standard (UNS) tolerances set by the American National Standards Institute (ANSI). This ensures reliable compatibility between production runs...and it's how you are supposed to make threads. Blue-Label lights feature a Class III thread fit. This is the most precision class and normally reserved for military and instrumentation applications. Ready-Made lights use a Class II thread fit. This is the most common class of fit and specified to ensure that parts are compatible without high percentage (costly) inspection.

Driver Mount

The Icarus driver is secured by a custom designed wave spring and polycarbonate "window" to keep out dust. The sleeve acts as an electrical contact for power transmission and to act as a heat sink for the driver itself. The hollow shape and distance from the LED helps with thermal isolation. The positive battery terminal is made from solid copper and has a large contact surface to ensure maximum electrical conductivity.

Titanium Pocket Clip

My pocket clip is made from ASTM Certified 6Al/4V titanium alloy. The hole at the top will pass two strands of 550 para cord. The bend in the tip of the clip is designed to increase grip, minimize the wear on your pocket, and avoid accidental snags. All Ti clips are manufactured from genuine ASTM Certified 6Al/4V (Grade 5) titanium. I'm the only maker on earth that uses Certified material, because I make no compromises. Certified Ti is 50% more expensive than generic. Don't be fooled by claims of "aerospace grade" materials...if it's not Certified, it's not aerospace grade.

"Tool Free" Clip installation

It doesn't look like much but this tailcap is a tour-de-engineering. I won't bore you with all the details but my crowning achievement is "tool free" installation. The clip "pops" over the O-ring so you won't loose it accidentally. Unlike most lights, you don't need to remove the O-ring to take the clip on/off. When the clip is removed, the retaining shoulder slides into the body and disappears. Most clips are "screw-on" which looks cool if you use the clip, but if not, there are two ugly holes in the side of your light. If your clip ever looses tension, simply install it backwards and re-tension it.

McClicky switch

Of course I use the most famous flashlight switch on earth. I tried every other kind of switch, and like most things, you get what you pay for. The McClicky is 5x the cost of other switches, but it's worth it. The McClicky is a "forward-type" clicky that allows momentary activation. The battery should always be changed through the head of the light. You should not open the tailcap unless you are replacing the switch or removing/installing the pocket clip. Removing the tailcap causes the compressed spring to rotate against the battery, putting undue and unnecessary stress on the switch spring which can lead to failure.

PACKAGE 1: APPRENTICE (+ $30.00)

Dominate the dark with the basic package: light + battery + charger

Delta Series light
2x18350 Keepower IMR
Battery Case
Xtar MC1 Charger (Lithium-ion ONLY)

PACKAGE 1: JOURNEYMAN (+$65.00)

Maintain your Delta like a pro and avoid buyer's remorse about your button color. Includes everything in the basic package, but you also get:

Maintenance kit (Nano-Oil + replacement o-rings)
O-ring removal tool with rubber grip
Three extra button colors of your choice
Switch Tool (Pronged tool to aid in removal of the switch and retaining ring. 3D printed in-house!)

PACKAGE 3: MASTER PACKAGE (+$75.00)

The full boat. A good friend once told me, "two is one and one is none." He was right, don't get caught in the dark. You get everything above, but you also get:

Spare UCL window (glass lens)
Spare McClicky tailcap switch

LED Type

Nichia 519A1 9080
battery type

18350 lithium-ion (IMR Chemistry)
Weight
Dimensions

1.0" x 3.75"
Voltage Range

2.8V-4.2V
Beam Distance

~100m (depends on LED and optic)

Brightness Levels

Fully User Programmable (Default is L/M/H)
Special Modes

Strobe, Beacon, SOS (added via programming)
Body Material

Varies depending on special edition
Pill Material

C145 Tellurium Copper
Window Glass

98% transmission UCL glass (2 side AR coated)
Water Resistance

IPX8 (10m)
Where it's made

solid copper pill

The massive copper pill and exposed cooling fins aren't for show, they provide unparalleled thermal management in an 18350 platform. This design also allows us to use any body material without any compromise to thermal performance. It also means Deltas have the best thermal performance of any 18350 light on the market.

User swappable optics

The Delta is the first EDC light with user swappable optics and assembled with your choice of optic beam angle. The narrow optic will give you the most range and smallest hotspot. The wide optic will give broad flood of light over the entire beam. You can buy additional optics on the accessories page. Narrow: 26 Degrees beam angle
Medium: 33 Degrees beam angle
Wide: 46 Degrees beam angle

THE FULLY PROGRAMMABLE ICARUS DRIVER LETS YOU DO YOU.

Launched in 2015, Icarus was in development for over 2 years. It's simple, powerful, full of features even the most demanding flashlight enthusiasts will appreciate. A maximum regulated current of 3.4 Amps delivers (usable) class-leading power and an advanced software platform lets you make Icarus a reflection of your unique preferences.

Direct Thermal Path MCPCB

DTP (Direct Thermal Path) was pioneered on kitchen tables by individual flashlight makers and modders. Industry finally took notice and developed a commercial solution to solder an LED directly to the copper base, without an intermediate layer. Enter SinkPad. I was the first maker/manufacturer on the market to adopt manufactured DTP LED boards and I've never looked back. Today, DTP is the de facto standard for high performance lights.

Thermal Pad: Panasonic PGS

I'm always pushing the limits and Alpha/Delta lights the the ONLY lights in the world using graphite thermal pads. Don't worry, like most things we pioneer, other people will catch on. The thermal interface (normally paste or tape) between the LED board and the flashlight is a bottleneck for heat. PGS has 6x the thermal conductivity of copper (one of the most thermally conductive metals) and is effectively invisible in the thermal path. This maximizes heat transfer away from the LED, allowing it to operate at maximum power for longer periods of time without causing damage to the LED.

Customer Reviews