Photoluminescent Exit Sign (Glow in the Dark)
Glow-in-the-dark exit sign with photoluminescent "EXIT" lettering on a red background. Needs no wiring or battery — it stores room light and glows when the lights go out.
| Option | Price | Availability | SKU |
|---|---|---|---|
| 1 piece | ৳450 | In stock | FSB-FD-EXIT-PL-1-PIECE |
| Pack of 5 | ৳2,100 | In stock | FSB-FD-EXIT-PL-PACK-OF-5 |
Delivery across Bangladesh. Cash on delivery available.
Delivery:
- Inside Dhaka: ৳60, about 2 days
- Outside Dhaka: ৳120, about 5 days
Payment methods: Cash on delivery, bKash, Credit / debit card, Cards, mobile banking and internet banking (SSLCommerz)
Specifications
- Product code
- FSB-FD-EXIT-PL
- Type
- Photoluminescent safety sign
- Type
- Photoluminescent (glow-in-the-dark) exit sign, non-electrical
- Legend
- Photoluminescent "EXIT" lettering on a red background
- Size
- Approximately 300 × 170 mm
- Material
- Rigid sign panel with photoluminescent layer
- Power
- None — charged by ambient light
- Charging light
- Daylight, fluorescent or LED; commonly about 54 lux or more on the sign face
- Glow
- Brightest in the first minutes, fading over several hours
- Fixing
- Screws or double-sided adhesive tape, indoor
- Color
- Red
- Pack Size
- Pack of 5, 1 piece
Description
A photoluminescent exit sign is a rigid, non-electrical sign whose "EXIT" lettering glows in the dark. The pale lettering contains a photoluminescent pigment that absorbs energy from the room lighting and releases it as a greenish glow when the lights fail. Because it has no wiring, lamp or battery, there is nothing to burn out or recharge. This sign has glowing letters on a red background.
How does a glow-in-the-dark exit sign work?
The pigment is charged by daylight, fluorescent or LED light falling on the face of the sign. In a power failure the stored energy is released as visible light: the glow is brightest in the first minutes and fades gradually over the following hours, remaining visible to eyes that have adapted to the dark. The cycle can repeat indefinitely, as long as the sign is properly lit beforehand.
The one condition: it must be kept lit
A photoluminescent sign only works if enough light reaches it while the building is in use. Signs of this type are commonly specified with a minimum of about 54 lux (5 foot-candles) on the face at all times during occupancy. A sign placed in a dim stairwell, behind a door or under a switched-off light will not be charged and will not glow.
Photoluminescent or electric exit sign?
| Photoluminescent sign | Illuminated LED exit sign | |
|---|---|---|
| Power | None | 220 V supply and battery |
| Running cost | None | Small |
| Brightness | Low, fades over time | Constant for the rated backup time |
| Needs | Good lighting on the sign beforehand | Monthly test, battery replacement |
| Typical role | Supplementary and low-level marking, small premises | Primary exit signs in larger buildings |
Where a building code or an audit requires internally illuminated exit signs, a glow sign does not replace them. It is widely used in addition — beside doors, at low level and along stairs — because it keeps working even if the emergency lighting fails.
Fixing and care
- Fix with screws or strong double-sided tape on a clean, flat surface above or beside the exit door.
- Keep it in the direct light of a lamp that is on whenever the building is occupied.
- Wipe with a damp cloth; dust and grease reduce both charging and glow.
- Do not paint or varnish over the sign.
Applications
- Above and beside exit doors in small shops and offices
- Stairwells and stair landings as supplementary marking
- Corridors of apartment buildings, hostels and hotels
- Warehouses and stores with good general lighting
- Low-level exit marking beside door frames
- Generator rooms and plant rooms
Recommended usage
Fix the sign flat on the wall above or beside the exit door, in the direct light of a lamp that stays on whenever the building is occupied. After fixing, switch off the lights for a few minutes to confirm that the lettering glows clearly. Use it together with illuminated exit signs where your building code requires them.
Safety instructions
A photoluminescent sign does not glow unless it has been exposed to enough light beforehand — never fit it in a dark or unlit place. It is not a substitute for electrically illuminated exit signs or emergency lighting where these are required. Fit it only at doors that lead out and are kept unlocked and unobstructed.
Frequently asked questions
How does a photoluminescent exit sign work without electricity?
The lettering contains a pigment that absorbs light from the room and releases it as a glow in the dark. No wiring, battery or bulb is involved, so the sign works in a power cut as long as it was well lit beforehand.
How long does a glow-in-the-dark exit sign glow?
It glows most brightly for the first several minutes and then fades slowly over a few hours, staying visible to dark-adapted eyes. How long and how brightly depends on the quality of the pigment and on how well the sign was lit before the lights went out.
Can a photoluminescent sign replace an illuminated exit sign?
Not where a building code or safety audit requires internally illuminated exit signs with battery backup. A photoluminescent sign is best used as an addition to them, or in small premises that are always well lit and where the rules allow it.
Does a glow-in-the-dark sign need sunlight to charge?
No, ordinary indoor lighting from LED or fluorescent lamps charges it, provided enough light falls directly on the sign. Sunlight is not needed, but a sign in a dim corner or under a lamp that is usually off will not charge properly.