Why This Matters on a Factory Floor
Under-lit warehouse aisles cut picking speed, raise accident risk and may fail a factory safety audit. Over-lit zones waste energy and heat. Getting high bay sizing wrong costs money twice: once in the electricity bill, once in production slowdown or failed inspection.
Textile, chemical and engineering plants across South Gujarat, Daman and the Mumbai belt face a further challenge. Coastal air, chemical dust and forklift wash-down can degrade a fitting that was not chosen for the right environment. A luminaire rated IP54 will fail quickly in a salt-laden or wash-down area where IP65 or IP66 is needed.
Choosing the right fitting from the start means the light stays on, the lux is right, and warranty claims do not balloon because the fitting was not fit for the job.
Understand Lumen Output, Beam Angle and Mounting Height
An LED high bay fitting's light is defined by two numbers: lumen output and beam angle.
Lumen output is the total light the fitting emits, measured in lumens (lm). A 100 W LED high bay might emit 12,000 lumens; a 200 W fitting, 25,000 lumens. The manufacturer's datasheet gives this figure.
Beam angle is the cone of light the fitting spreads. A narrow beam (30 to 60 degrees) throws light far and deep. A wide beam (90 to 120 degrees) spreads light across a wider area. Narrow beams suit tall mounting heights; wide beams suit lower heights.
Mounting height is where the fitting hangs. Warehouse trusses might place fittings at 5 to 8 metres. Factory floors with lower ceilings might use 3 to 4 metres. Industrial plants with high bays can exceed 12 metres.
As mounting height rises, the same fitting covers a larger floor area but spreads its light thinner. To hold the same illuminance on the working plane (the floor or bench where work happens), a higher mounting needs either a narrower beam angle or higher lumen output, or both.
Match the Fitting to Your Floor Layout
A warehouse with narrow aisles between tall racking needs narrow-beam fittings positioned over each aisle. Wide-beam fittings waste light in the racking itself.
A flat-floor factory with work benches distributed across the space benefits from wider-beam fittings that cover larger areas with more even light.
A typical working-plane illuminance for warehouse aisles is 200 to 500 lux, depending on the fineness of work and safety requirements. The actual number is set by your process, the task, and the local electrical code. Confirm this figure with a licensed electrical contractor when sizing the scheme.
Once you know the mounting height, the floor layout and the target lux, use the manufacturer's datasheet to find a fitting with the right lumen output and beam angle. Datasheet information includes photometric diagrams that show how light spreads at different distances.
Choose the Right IP Rating for Your Environment
The IP rating (Ingress Protection rating) has two digits. The first rates dust protection; the second rates water protection. IP54 means dust-protected and splash-resistant. IP65 means dust-tight and low-pressure water jet resistant. IP66 means dust-tight and high-pressure water jet resistant.
On a factory floor, the environment varies by zone.
| Zone Type | Environment | Typical IP Rating |
|---|---|---|
| Storage aisle | Dry, no direct spray | IP54 |
| Wash-down area | Regular low-pressure water | IP65 |
| High-pressure wash zone | Direct jets, salt-laden air | IP66 |
| Coastal or chemical plant | Salt or chemical vapour | IP65 minimum |
Dust also matters. A textile mill or grain store is dusty; so is a concrete batching plant or a chemical powder unit. IP54 allows some dust ingress. IP65 and IP66 block dust more completely. If your floor is exposed to sea air or salt spray (as in Daman), specify IP65 or IP66 even if water spray is rare; salt damage to unprotected electronics and metal can fail a fitting in months.
Match the fitting to the harshest zone it will face. If a warehouse has both dry storage and a forklift wash-down bay, and both are lit by the same circuit or system, fit the higher IP rating across the lot rather than mix fittings.
Worked Example: Sizing for a Textile Warehouse
A textile warehouse in South Gujarat has a storage area with tall racking. Fittings will hang from trusses at a height of 7 metres. The aisles are 4 metres wide. The required working-plane illuminance is 300 lux. The zone is dusty but not water-sprayed; however, the coastal location means salt-laden air is present.
Step 1: The shop-floor environment is dusty with salt exposure. IP rating required is IP65.
Step 2: Mounting height is 7 metres. Beam angle should be narrow (45 to 60 degrees) to avoid wasting light in the racking. Beam angle determines the floor coverage diameter. A 45-degree beam at 7 metres covers roughly a 6-metre circle; a 60-degree beam covers roughly 8 to 9 metres.
Step 3: For 300 lux on a 4-metre-wide aisle at 7 metres height, and assuming a fitting efficiency of 85 to 90 per cent, a 100 to 150 W LED high bay rated at 14,000 to 18,000 lumens would be a reasonable starting point. The exact figure depends on the beam angle, the ceiling reflectance and the reflectance of the racking itself.
Step 4: Space fittings so the light circles overlap slightly, avoiding dark spots between them.
Step 5: Confirm the final scheme with a licensed electrical contractor using the manufacturer's datasheet and site-specific measurements.
Note: This example uses indicative figures based on typical warehouse conditions and beam geometry. Confirm the actual lumen output, beam angle and IP rating against the manufacturer's current datasheet and site conditions with a licensed electrical engineer before ordering.
Quality and Durability in Industrial Conditions
LED high bay fittings are rated for a long operating lifespan compared with older discharge lamp designs, which means fewer lamp replacements in tall racking areas. However, the lifespan claim depends on the fitting being matched to the environment.
A fitting with good thermal design, aluminium heat-sink construction and sealed electronic drivers will withstand temperature swings, vibration and dust better than a poorly made one. Check the datasheet for thermal management details and material specifications.
The fitting's mechanical design also matters. Mounting lugs should be sturdy; electrical terminals should be accessible for a contractor to wire safely. Some fittings offer tool-less access to terminal blocks; others require a screwdriver. Both are fine, provided they meet the standards and allow a licensed electrician to install and maintain the circuit.
Warranty and service are handled by the brand's own authorised service centre, not by the distributor. Vimal Electric Corporation and Vimal Powers stock the fittings but do not repair or service them. If a fitting fails within the warranty period, contact the brand's service network directly.
Standards and Electrical Compliance
LED high bay fittings for factory and warehouse use are governed by safety and installation standards that your licensed electrical contractor will follow.
The degree of protection (IP rating) is defined by IEC 60529. General safety requirements for electric luminaires are covered by IEC 60598. Code of practice for electrical wiring installations in India is given in IS 732. Earthing practice for industrial electrical installations is covered by IS 3043. General requirements for switchgear and control gear used to switch and protect high bay lighting circuits are covered by IEC 60947 and IS 13947. Protection of low-voltage installations against electric shock falls under IEC 60364. Requirements for protection against lightning on outdoor high-mast installations are set out in IEC 62305. Cables used to feed high bay circuits are commonly specified against IS 694 for PVC insulated cables and IEC 60228 for conductor sizing. Miniature circuit breakers are covered by IEC 60898, while residual current devices are covered by IEC 61008 and IEC 61009.
Refer to the current edition of IS 732, IS 3043, IS 694, IS 13947, IEC 60947, IEC 60898, IEC 61008, IEC 61009, IEC 60364, IEC 62305, IEC 60228, IEC 60529 and IEC 60598, and confirm with your licensed electrical contractor.
What We Stock
Bajaj Electricals markets a dedicated Industrial lighting range alongside Area lighting, Street lighting, Commercial lighting and Poles and high masts ranges for outdoor and yard applications. Havells offers a dedicated LED high bays range, separate from LED floodlights and LED street lights for perimeter and yard use.
Vimal Electric Corporation and Vimal Powers stock both ranges. To specify a fitting, send a single-line diagram or a load list showing the mounting height, floor layout, required lux, environmental conditions and IP rating to our enquiry page. A licensed electrical contractor or our team will match a fitting from the available stock to your needs. For installation, wiring, commissioning and any service issues, contact the brand's authorised service centre.