Fake Fire Effects: Silk Flames, Flame Bulbs, LED Candles and Fire on Fabric

There are five ways to put fire in a Halloween display without lighting anything: a fan blowing fabric over colored LEDs, a flame-effect bulb, an LED candle, a video of fire on a screen or a window, and fabric painted or lit to look like flame.

How a Silk Flame Works

A silk-flame light blows a strip of thin fabric upward while colored LEDs light it from below. QTX, a UK effects maker, uses fans, and describes its unit in one line: “the silk flame flutters in the air whilst lit up with a combination of 10mmØ LEDs, giving the appearance of a hot flame.” Setup is “Unwrap the silk flame and place into the slot between the LEDs,” and at power-on “fans will start to blow and the silk flame will start to rise” (QTX QTFX manual). The QTX is a 230-volt unit for UK mains, so it’s here for the mechanism, not as a pick. In the US you want a 120-volt fixture.

Chauvet DJ’s Bob LED is the 120-volt version with a published manual. It draws 33 watts at 0.3 amps, uses 54 orange and 12 blue LEDs, and stands on three legs or hangs from a chain (Bob LED user manual). The silk clips on with magnets: “Attach each magnetic strip on the simulated silk flame to a silk attachment plate on the base. Be careful not to damage the silk.” Two rules in the manual matter most for a haunt:

• “Be sure the silk is free from the air vents on the base, before powering on or walking away.”
• “Be sure the silk flame is clear of the chain while hanging and during operation.”

Chauvet also says to install it “at least 20 in (50 cm) from adjacent surfaces,” that it’s “for indoor use only! (IP20),” and to “Never connect the product to a dimmer.” That last one rules out plugging a silk-flame unit into a lamp dimmer or an inline flicker controller to add more movement.

For scale, Chauvet’s discontinued Firebird LED threw a 6.5-foot (2 m) silk and drew 192 watts (Chauvet DJ), against the tabletop Bob’s 33. Our reading is that bigger flames need a lot more power.

The heat question

Chauvet’s product page says Bob LED “generates no heat” and “perfectly simulates a flickering cauldron” (Chauvet DJ). The same company’s manual says: “Make sure there are no flammable materials close to the product when operating” and “Do not touch the product’s housing when operating because it may be very hot.”

The newer multicolor Bob LED H3 says both in one document. Its quick reference guide calls it “a multi-colored flame simulator that does not produce heat,” then lists among its safety notes “DO NOT allow flammable materials close to the product when it is operating” and “DO NOT touch the product’s housing when it is on because it will be hot” (Bob LED H3 guide). It also repeats the 20-inch clearance, the indoor-only IP20 rating and the no-dimmer rule, and adds “Be sure that no ventilation slots on the unit’s housing are blocked.”

“No heat” describes the flame, which is fabric and light. The base is an electrical fixture, and Chauvet warns that dust “can cause overheating” and says to clean its lights “at least twice a month.” For a Halloween display that means: on a hard surface, 20 inches from the backdrop, no cheesecloth draped over the base to hide it, and the silk moving freely before you walk away.

Amazon also sells smaller silk-flame lamps from brands with no maker site or manual, so all we can report for them is what the listing claims.

Flame Bulbs

A flame-effect bulb is a grid of small LEDs switched in a pattern so the light seems to rise and flicker. They’re decor light, not room light. Feit’s figures for its two flame bulbs (C/FLAME2/LED, BPFLAME/C/LED/2):

	C/FLAME2/LED	BPFLAME/C/LED/2
Base	E26 (standard)	E12 (candelabra)
Power	3 W	2 W
Light	60 lumens in the spec table, “80-lumen glow” in the description	35 lumens
Color	1500K	1500K
Rating	Wet location, outdoor	Damp location
Enclosed fixtures	Yes	Yes
Dimmable	No	No

A flame bulb in a porch lantern reads as a flame from the street. It won’t light the steps, so keep a separate path light. The wet rating on the E26 bulb is what lets it go in an open outdoor fixture or a torch-style post light. Neither Feit bulb is dimmable, so put them on a plain switch or timer.

For the “fire inside the house” window, aim a flame bulb in a clip lamp at the glass from behind a branch silhouette. Our window display guide covers the silhouettes.

Why LED and not a warm incandescent near fabric: ENERGY STAR says “incandescent bulbs release 90% of their energy as heat” (ENERGY STAR). NFPA’s Halloween tip sheet says to “Keep all decorations away from open flames and other heat sources like light bulbs and heaters” (NFPA). LEDs run cooler, but they still aren’t something to wrap in cloth.

LED Candles and Moving Wicks

Most LED candles are a single LED that flickers behind a plastic flame. The moving-flame kind adds a physical part. Luminara says its circuit board “moves an attached magnet to the bottom of the flame” (Luminara), and on its taper page, “When you turn on your Luminara candle, the batteries send power to a coil inside that generates a magnetic field” (Luminara tapers). The flame piece swings on a wire, so it moves with the light and catches drafts.

That mechanism has costs. The white melted-top tapers are $69.99 for two on Luminara’s page, which lists them as 9.5 inches tall, 2 AA batteries, “200+ Hours,” a “5 Hours On / 19 Hours Off” timer and an indoor intended use. And if the flame stops moving, Luminara’s help center says to “gently try to nudge or tug (re-position) the flame so that it sits properly on the hook or wire,” adding “Please be very careful when doing this as the tip can break easily and we do not have replacement parts” (Luminara help). So these belong on a mantel or table, not in a pumpkin on the steps where kids grab them.

A blinking Luminara isn’t a mode: “A blinking light from your candle indicates that your batteries are low and it is time to change them” (Luminara help). For outside, Luminara sells a separate line rated IPX4, “ensuring weather resistance and protection from splashing water,” with drainage and feet at the base (Luminara help).

Cheap multi-packs of LED tealights and tapers run on coin cells or AAs and cost a fraction per light. Before you scatter them where children or pets can reach, read the coin-cell section of our jack-o’-lantern lighting guide, which covers the CPSC injury figures, Reese’s Law and how to test an old battery door. The same guide has our tealight picks and a battery-life table.

Projected Fire

Video fire is the one version with no fixture near the decor at all. AtmosFX sells an Inferno collection of four fire scenes (Raging Inferno, Fiery Blaze, Ring of Fire and Burning Embers) at $12 each or $35 for the set, as 1080p MP4 files in horizontal and vertical versions. Each comes in Realistic Flames, Green Wildfire, Blue Burn and Purple Blaze, with a continuous loop or one where flames rise and fade (AtmosFX).

AtmosFX’s own ideas for it (AtmosFX):

• A burning window. “Simply put some Window Projection Material in your window, and you’ll instantly have a three-alarm fire at your home.”
• A pumpkin. “Why not drop a tablet displaying Inferno inside a carved jack-’o-lantern?”
• A mini projector on a prop or wall.

A tablet puts moving fire video inside a carved pumpkin with no flame, though a tablet in a damp pumpkin is a tablet at risk, so bag it or use a foam pumpkin. For screens, projector brightness, throw distance and what the AtmosFX license allows, see our whole-house projection guide.

Campfires, Torches and Cauldrons

Fake campfire. Chauvet’s manuals want “no flammable materials close” and 20 inches (50 cm) from adjacent surfaces, so wood logs, leaves and fabric don’t belong around the base. Surround the silk flame with non-flammable pieces, such as a ring of stones, kept 20 inches from the unit, and keep the vents and silk clear.

Torches. A wet-rated flame bulb in an outdoor post lantern or torch-shaped fixture is the simplest outdoor “torch.” The Feit E26 bulb above is rated for it. Silk-flame lights with an IP20 rating aren’t.

Cauldron fire. Chauvet’s “flickering cauldron” describes the look, not a placement. Putting the unit inside a plastic cauldron would put a wall closer than the manual’s 20-inch clearance and box in its ventilation, and the H3 guide sets a 104°F (40°C) maximum ambient temperature. Stand the unit on the floor behind an open-top cauldron prop, 20 inches from it, so the silk rises into view above the rim. A cauldron of mist is a different build: an ultrasonic mister such as the PULACO mist maker sits in water, and our cauldron punch guide covers how to keep it and its cord away from anything people drink.

Fire on Fabric

The question that comes up every October: how do you make fabric look like fire? Three ways, from simplest to most involved.

1. Streamers over a fan. This is the silk-flame light, built bigger or bought. Thin fabric is the point: it has to lift in a small airstream.
2. Paint the flames and light them. Draw the flame shapes in orange, yellow and red on dark fabric and light them from the front with an LED flame bulb or a warm LED flood. Jacquard says its Neopaque fabric paint gives “maximum coverage on virtually any dark ground” and is “Exceptionally washfast on fabric” (Jacquard). Follow the setting directions on the bottle.
3. Project fire onto it. A scrim or window material with the Inferno video behind it, as above. No light source touches the cloth.

Fabric and heat

The CPSC’s advice on costumes is to choose “polyester or nylon fabric and not sheer cotton or rayon fabric,” then adds: “However, any fabric can burn if it comes in contact with an open flame” (CPSC).

The federal flammability standard, 16 CFR 1610, covers “textiles and textile products for clothing use,” including “costumes finished for consumer use” (eCFR). It doesn’t cover cheesecloth, curtains or streamers bought for a display.

Flame retardant sprays

Flame retardants are what theaters use on drapes and scenery. Rosco, which makes the Roscoflamex line, starts its explainer with “Nothing is flame proof, anything will burn if it gets hot enough,” and says retardants “retard ignition and slow the spread of fire” (Rosco).

What the makers’ own documents say:

• Roscoflamex DF is for “sheer fabrics, fine synthetic weaves, rayon, or silk.” Rosco’s spec sheet says to “hang fabric vertically and spray in light, overlapping, passes from the bottom to the top,” warns “The hand and drape of delicate materials may be altered if oversaturated,” and notes “May cause skin and eye irritation on some people. Use in a well ventilated area” (Roscoflamex DF spec sheet). The product page says “ALWAYS treat a test sample” (Rosco).
• Roscoflamex MC covers a wider list, including cotton, burlap, silks, polyesters, paper, cardboard and wood (Rosco). Its directions say it “CANNOT BE USED ON PAINTED, VARNISHED, STAINED, OR SEALED WOOD.” For silk and chiffon its directions say “Apply a very light spray” and “do not aim fan directly at the treated item” (Roscoflamex MC directions).
• Flamecheck M-111 treats natural, synthetic and blended fabric and fine silk. One gallon covers “300-600 sq. ft. depending on the weight of the material,” and synthetics may need two or more light coats. Flamecheck says to “Cover electrical devices and heating and cooling vents” while spraying, and “Retest and retreat every 3-5 years or after washing/dry cleaning” (Flamecheck).

Rosco says Roscoflamex DF and MC are tested to NFPA 701, and Flamecheck says M-111 meets it. That’s the makers’ claim; the standard itself is a paid NFPA document we didn’t review.

The catch for Halloween is water. Rosco says its Flamex products “are water soluble and are easily removed by laundering and exposure to water,” and Flamecheck says M-111 “is not fast to washing in water.” A treated banner in the yard is exposed to water every time it rains. Treat indoor pieces, and retreat anything that gets wet or washed.

Rosco reprints the NFPA 705 field test on its page. Samples are cut from the material, dry, and “a minimum of 1/2 in x 4 in (12.7mm x 101.6mm)”; the test “should be performed in a draft-free and safe location free of other combustibles,” with the sample hung vertically. “Flame should be applied for 12 seconds,” and “There should not be more than 2 seconds of afterflame.” Materials that “break or drip flaming particles should be rejected if the materials continue to burn after they reach the floor.” (Flamecheck calls its 12-second vertical test the NFPA 701 field test.) Test a cut sample, never the piece that’s hanging.

Keep Real Flame Out of the Fake Fire

A display built to look like fire is the worst place for a real one. NFPA says “Decorations are the first thing to ignite in more than 800 reported home fires each year. Nearly one-third of these fires were started by a candle.” Its candle report found that in 60 percent of home candle fires, something that could burn, such as curtains or decorations, was too close to the candle, and 16 percent involved candles left unattended (NFPA, Home Candle Fires).

The USFA’s rule is “Keep candles at least 12 inches away from anything that burns,” and its alternative is “battery-operated flameless candles, which can look, smell and feel like real candles” (USFA). Streamers move, cheesecloth sags and guests brush past, so 12 inches on setup day doesn’t hold all night. If you want one real flame in a pumpkin, the jack-o’-lantern guide covers how to do it supervised, away from any of this.

NFPA also says to “keep exits clear of decorations,” which applies to a silk-flame “campfire” in a hallway as much as a prop.

Flicker and Photosensitivity

The Epilepsy Society says “Light bulbs should not trigger seizures unless they are faulty, flickering, or flashing when they are not designed to” (Epilepsy Society). A flame bulb is designed to flicker, and no maker we checked states its flicker rate, so we can’t tell you where any of them sits. The clearer risk is the extra modes some fire lights carry. The multicolor QTX flame unit lists a “Shutter/strobe effect” and a DMX strobe channel. The Bob LED H3 has a mode that “Automatically snaps through colors one by one,” red among them, and Epilepsy Action says “Red is the colour most likely to trigger a seizure” (Epilepsy Action). The H3’s optional IRC-6 remote adds a strobe button. Neither QTX nor the H3 guide states a flash rate for these modes. The discontinued Firebird LED listed a “Strobe Rate: 0 to 12 Hz.” Leave strobe and snap modes off in any room guests can’t avoid, and read the flash-rate figures in Lighting Your Haunt: strobes before you use one.

Frequently Asked Questions

Do fake flame lights get hot? The flame doesn’t, but the housing can. Chauvet’s manuals for its Bob LED lights say the housing “may be very hot” or “will be hot,” and to keep flammable materials away and 20 inches of clearance.

Can I leave a silk-flame light running outside? Not the Chauvet units, which are IP20 and indoor only. For any other brand, follow the maker’s water rating. If a unit has no stated rating, we can’t give outdoor advice for it.

Does flame retardant spray make fabric fireproof? No. Rosco: “Nothing is flame proof.” Retardants slow ignition and spread, and the common sprays wash out in water.

Related Resources

Our Halloween lighting guide compares bulb types, and Lighting Your Haunt: fixture types covers where candles and flame effects fit in a whole haunt. For effects that pair with fire, see Halloween lightning effects and lasers and fog, and check whether fog sets off your smoke alarm before you add haze.