5mm Round Top Extra Fast Flashing 6Hz LED

5mm extra-fast flashing LEDs (6Hz) strobe at six flashes per second — six complete on-off cycles every 1,000 milliseconds.

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5mm extra-fast flashing LEDs (6Hz) strobe at six flashes per second — six complete on-off cycles every 1,000 milliseconds. At this rate, individual flashes begin to blur together in peripheral vision, creating the intense, urgent, staccato pulse associated with emergency vehicle light bars, ambulance strobes, and fire truck warning beacons. The built-in integrated circuit (IC) inside each LED handles all timing internally with no external components beyond a standard current-limiting resistor. No microcontroller, no code, no programming — just apply DC power through the correct resistor and the 6Hz strobe begins instantly. This is the fastest flash rate we stock, and it is purpose-built for applications that demand maximum visual urgency: emergency vehicle scale models, security system strobe indicators, arcade machine attract modes, stage and party lighting accents, and any prop or project where the goal is an unmistakable “alarm” or “danger” visual signal.

Emergency vehicle models and diorama builds: The 6Hz rate closely approximates the strobe cadence of real-world emergency light bars. Police car modelers in 1:24, 1:43, and 1:64 scales wire red and blue 6Hz LEDs into roof-mounted light bar housings for a convincing emergency strobe effect. Fire truck builders use red and amber 6Hz LEDs for the rapid cascade pattern on modern apparatus light bars. Ambulance modelers combine red and white 6Hz LEDs for intersection warning flashers. Tow truck and highway maintenance vehicle models use amber 6Hz LEDs for roof-mounted rotating beacon simulation. The 5mm body fits directly into panel-mount holes drilled in plastic model roofs and light bar housings, and at 20mA the LEDs run cool enough to be enclosed in small plastic structures without heat concerns. For builds that need the police red/blue alternating pattern specifically, also see our 5mm red/blue alternating LEDs which contain both colors in a single package.

Arcade machines, pinball, and party effects: Classic arcade cabinet restorers wire 6Hz LEDs behind translucent marquee panels, coin-slot surrounds, and playfield inserts for the rapid-fire flash effects that defined 1980s and 1990s attract modes. The 6Hz rate is fast enough to create visual excitement without crossing into the uncomfortable flicker range that some people find disorienting at very high frequencies. Pinball machine builders mount 6Hz LEDs behind pop bumper caps and slingshot plastics for the rapid strobe that fires during multiball and jackpot sequences. Home party and rave lighting builds use blue and white 6Hz LEDs as mini strobe accents behind diffuser panels and inside translucent decorations. DJ booth builders wire 6Hz LEDs into custom control panels as beat-sync visual cues. Escape room designers use red 6Hz LEDs behind tinted panels as “time running out” alarm indicators that ramp up urgency during the final countdown phase of a puzzle sequence.

Security systems and industrial warning: Red 6Hz LEDs are a common choice for fake and real security system strobe indicators. Mounted behind a tinted dome on a wall or eave, the rapid 6Hz flash is visible from across a parking lot at night and signals “alarm system active” to potential intruders. DIY home security builders use red 6Hz LEDs on motion-activated circuits (triggered by a PIR sensor and MOSFET) as visual alarm outputs that accompany a siren or silent alert. Workshop and industrial makers use amber 6Hz LEDs on equipment status panels to signal critical fault conditions that require immediate operator attention — the rapid strobe differentiates a critical alarm from a routine status blink (typically 1Hz) at a glance across a noisy shop floor. Amateur radio operators use red 6Hz LEDs as high-SWR warning indicators on antenna tuner panels where a fast flash is more attention-getting than a steady-on LED during transmit.

Available colors and specifications: We stock 5mm 6Hz extra-fast flash LEDs in red, orange, amber, yellow, green, blue, cool white, and warm white. All have a water-clear lens with a 15–30° viewing angle for maximum forward brightness (mcd). Forward voltage by color: red/orange/yellow/amber ≈ 2.0–2.2V; blue/green/white ≈ 3.0–3.2V. Maximum forward current: 20mA. Peak brightness during the on phase is identical to a standard static 5mm LED of the same color. Average power draw is approximately half of a continuously lit LED due to the ~50% duty cycle. Use our LED resistor calculator to find the correct resistor value for your supply voltage. For AC or DCC power sources, add a bridge rectifier and smoothing capacitor — see the AC/DCC wiring guide. New to LEDs? Pre-wired LEDs include the resistor on the wire.

6Hz vs. other flash rates: At six flashes per second, the 6Hz rate is three times faster than 2Hz fast flash and six times faster than 1Hz slow flash. The visual effect is dramatically different: where 1Hz and 2Hz produce clearly countable individual blinks, 6Hz creates a strobe-like flicker that the eye perceives as a continuous rapid pulse. This makes 6Hz ideal for emergency simulation and alarm effects, but too aggressive for applications like railroad crossing signals (use 1Hz) or gentle safety markers (use 0.25Hz). For applications requiring an even more intense strobe effect, consider driving a standard static LED from an Arduino or 555 timer at higher frequencies — but for most hobby and model-building purposes, 6Hz provides more than enough visual urgency. For a softer, organic effect, try flickering candle LEDs or fading/breathing LEDs.

Related categories: The same 6Hz extra-fast flash animation is available in 3mm, 1.8mm, and 10mm through-hole sizes. For static (non-flashing) 5mm LEDs, see 5mm round-top LEDs. For the red/blue police alternating pattern in a single LED, see 5mm red/blue alternating LEDs. For animated LEDs with pre-attached resistor wires, browse animated pre-wired LEDs. For wider-angle strobe visibility from all directions, see diffused LEDs and drive them with an external flasher circuit.

6Hz means six complete on-off cycles per second. The LED flashes on and off six times within a single second, producing a rapid strobe-like effect. Each on phase lasts approximately 83 milliseconds. At this speed, individual flashes are difficult to count by eye and blend into a continuous rapid pulse, similar to the strobe lights on emergency vehicles.
The risk zone for photosensitive seizures is generally considered to be between 15Hz and 25Hz with large-area, high-intensity light sources. A single 5mm LED at 6Hz is a very small point source with low overall luminous flux, far below the intensity thresholds studied in clinical photosensitivity research. However, if you are building a large array of many 6Hz LEDs or using them in an enclosed space at close viewing distance, it is reasonable to post a warning for visitors with known photosensitive conditions. For public installations, consult applicable safety guidelines for your jurisdiction.
Real police light bars use a combination of flash patterns typically ranging from 4Hz to 15Hz depending on the module and manufacturer. A 6Hz LED produces a convincing rapid strobe that reads well at scale. For a more complex pattern with both red and blue in a single LED, see our 5mm red/blue alternating LEDs. For the most realistic multi-pattern light bar simulation, dedicated modelers sometimes use an Arduino driving standard static LEDs through custom flash sequences — but for a simple, effective, no-code solution, the 6Hz rate is an excellent match.
No. The flash rate does not affect the resistor calculation. All animated LEDs — regardless of flash speed — have the same forward voltage and maximum current ratings as standard static LEDs of the same color. A red 6Hz LED uses the same resistor as a red 1Hz, 2Hz, or static red LED. Use our LED resistor calculator to find the correct value for your supply voltage and LED color.
No. The flash rate is permanently set by the internal IC and cannot be changed by the user. Reducing voltage or current will dim the LED or prevent it from operating, but will not change the flash frequency. If you need a different rate, choose the appropriate animated LED: 1Hz slow flash, 2Hz fast flash, or 0.25Hz extra-slow flash. For fully custom flash patterns at any speed, use a standard static LED driven by an Arduino or 555 timer.
Yes, but you must convert to DC first. DCC track power and AC transformers produce alternating current, and all LEDs (including animated ones) require DC. Add a bridge rectifier and smoothing capacitor between the power source and your LED circuit. See the AC/DCC wiring guide for complete wiring instructions. Once the power is converted to clean DC, the 6Hz strobe operates normally.