An indicating lamp (also called a pilot light or indicator light) is a compact visual signalling device mounted on control panels, distribution boards, and machine enclosures to communicate the live status of electrical circuits and equipment. Red lamps alert operators to faults or tripped conditions; green lamps confirm normal running; yellow/amber lights indicate standby or warning states; blue and white lights serve custom signalling purposes. At Electrihub, India's trusted electrical e-commerce platform for switchgear and automation products, you can buy Indicating Lamp products from eight world-class brands — all under one roof, with verified specifications, competitive pricing, and fast delivery.
Modern industrial plants, commercial buildings, data centres, and infrastructure projects rely on hundreds of control signals every day. Without a reliable indicating lamp at each critical point, operators must rely on meters or software alone — slowing down fault detection and increasing downtime. High-quality LED or filament-based pilot lights provide:
| Type | Technology | Best For | Typical Voltage Range |
|---|---|---|---|
| LED Pilot Light (Integral LED) | Built-in LED, no replaceable bulb | New panel installations, long service life | 24 V AC/DC – 230 V AC |
| LED Pilot Light (Transformer LED) | LED with integral transformer block | High-voltage circuits (400 V AC) | 380–415 V AC |
| Filament / Incandescent Pilot Light | Replaceable BA9s / BA15d bulb | Legacy panels, replacement upgrades | 6 V – 230 V AC/DC |
| Neon Pilot Light | Neon glow lamp | Low-cost mains voltage indication | 110 V – 230 V AC |
| Monolithic / Compact Pilot Light | Self-contained single-piece LED body | Space-constrained panels, OEM assemblies | 24 V – 230 V AC/DC |
| Tower / Stack Light Module | Multi-segment stackable LED columns | Machine status at-a-glance, shop floor | 24 V DC / 230 V AC |
ABB's pilot lights are part of its renowned KA2 / KA4 series and the newer CL / CL2 series control & signalling range. Built to IEC 60947-5-1, they feature robust thermoplastic housings, high-brightness LEDs, and wide voltage ranges. Popular models include:
ABB indicating lamps are widely used in motor control centres, switchboards, and automation panels.
Eaton's M22 series and A22 / SIL series pilot lights offer IP66/IP69K sealing, 22 mm standard mounting, and modular construction. They are engineered for harsh environments including food & beverage, offshore, and heavy industry. Popular models:
Eaton indicator lamps are RoHS-compliant and feature tool-free front-panel replacement.
Havells is one of India's most trusted electrical brands. Its EPL series and MCBH indicator lights are designed for LT switchgear panels, distribution boards, and industrial control systems. Popular models:
Havells indicating lamps are a go-to choice for panel builders and electrical contractors across India.
Schneider Electric offers the widest portfolio through its Harmony XA2, XB4, XB5, XB7, XVB, XVC, and XVG series — covering 22 mm and 30 mm mounting from 24 V to 415 V. Popular models:
Siemens' 3SB3 / 3SB4 series (SIRIUS ACT) and classic 3SB2 series cover 22 mm and 30 mm panel cut-outs with LED and filament light elements. Popular models:
Larsen & Toubro manufactures the GML1 series and KSB series pilot lights, widely used in Indian industrial panels, power distribution boards, and control desks. Popular models:
ESBEE is a specialist Indian switchgear brand offering cost-effective indicating lamps for panel builders, OEM machine manufacturers, and electrical contractors. Popular models:
ESBEE offering is ideal for budget-conscious projects without compromising on reliability.
Indicating lamps find application across virtually every industry where electrical equipment is monitored or controlled. Common use cases include:
When you buy Indicating Lamp online, keep the following selection criteria in mind to ensure the correct product for your application:
| Selection Parameter | What to Check |
|---|---|
| Mounting Diameter | 22 mm is the most common standard; 16 mm and 30 mm are also available. |
| Supply Voltage | Match the pilot light voltage to your control circuit — 24 V DC, 110 V AC, 230 V AC, or 415 V AC. |
| Light Source | LED for long life and low heat; filament/neon for legacy or low-cost replacements. |
| Lens Colour | Follow IEC 60073 — Red = fault/emergency; Green = safe/running; Yellow/Amber = caution; Blue = mandatory; White = general. |
| IP Rating | IP40 for indoor cabinets; IP65/IP66 for outdoor or washdown environments. |
| Connection Type | Screw clamp (LC) for standard wiring; spring clamp for faster assembly; spade terminal for panel wiring looms. |
| Lens Shape | Flat for flush panels; projecting/round for easy visual identification at a distance. |
| Brand & Series | Match existing panel brand for uniformity; check interchangeable accessories availability. |
Q. What is an indicating lamp and how does it work?
An indicating lamp is a small signalling light mounted in a control panel to show the operating status of electrical equipment. It is connected directly across a circuit or via a control voltage signal. When the circuit is energised, the lamp illuminates, providing instant visual confirmation of the state — running, stopped, fault, or standby.
Q. What is the standard mounting diameter for industrial indicating lamps?
The most widely used standard is 22 mm, which is compatible across ABB, Schneider (Harmony), Siemens (SIRIUS ACT), L&T, Havells, and ESBEE ranges. 30 mm is common in older panels and some specific applications; 16 mm is used in compact or miniature panels.
Q. What is the difference between an LED pilot light and a filament pilot light?
LED pilot lights use light-emitting diodes — they consume very little power (typically under 1 W), generate almost no heat, and have an operational life of 50,000+ hours. Filament (incandescent) pilot lights use a replaceable bulb, have higher power consumption and heat generation, but are often more economical upfront. For new installations, LED is strongly recommended.
Q. Which brands of indicating lamps are available at Electrihub?
Electrihub stocks indicating lamps from ABB, Eaton, Havells, Schneider Electric, Siemens, L&T (Lauritz Knudsen), and ESBEE. Each brand offers multiple series covering different mounting sizes, voltages, colours, and environmental ratings.
Q. What voltage indicating lamps are available?
Electrihub offers indicating lamps in a wide range of supply voltages including 12 V DC, 24 V AC/DC, 48 V AC/DC, 110 V AC, 120 V AC, 220–230 V AC, 230 V DC, and 380–415 V AC — covering virtually all industrial control circuit standards worldwide.
Q. Can I buy indicating lamps in bulk for panel building projects?
Yes. Electrihub offers bulk pricing and project quotes for panel builders, electrical contractors, and OEM manufacturers. You can use the Enquiry Dashboard on Electrihub.com or contact our sales team directly for customised pricing on large quantity orders.
Q. Are the indicating lamps on Electrihub genuine and original?
Absolutely. Electrihub is an authorised distributor for all brands listed on the platform. Every indicating lamp sold is sourced through official brand supply chains and comes with full manufacturer warranty and genuine product documentation.
ESBEE Indicating Lamp, Havells Indicating Lamp, Lauritz Knudsen Indicating Lamp, Siemens Indicating Lamp, Schneider Indicating Lamp
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