Factory Lighting Too Dark What Should You Measure When Workers Cannot See Clearly Malaysia
Factory Lighting Too Dark What Should You Measure When Workers Cannot See Clearly Malaysia A factory lighting problem often begins with a simple complaint: “This area is too dark.” Workers may say: “We cannot see the markings clearly.” QA may report: “It is difficult to inspect surface defects.” Maintenance may notice: “Some areas are much darker than before.” Warehouse staff may say: “The racking area is too dark to read labels.” Production may report: “Operators have difficulty seeing small components.” The immediate reaction may be: “We need a lux meter.” A lux meter may be part of the solution. But the real question is: Where is the lighting inadequate, for which task, and under what operating condition? A practical investigation is: Work Task → Measurement Location → Illuminance → Uniformity → Time / Operating Condition → Corrective Action → Measure Again 1. Start With the Work Task Not every factory area performs the same work. Consider: Warehouse aisle versus Precision inspection table versus General production area versus Electrical maintenance work versus Packing station The visual demand can be very different. Therefore, do not start by asking: “How many lux should a factory have?” First ask: “What work is being performed here?” 2. “Factory Lighting” Is Not One Number A factory may contain: Production Assembly Inspection Packing Warehouse Loading Bay Laboratory Office Maintenance Area One reading at the factory entrance does not represent all these locations. 3. Measure Where the Worker Actually Looks This is important. If the worker is inspecting a component on a table, the relevant measurement point may be the actual work surface. Do not automatically hold the lux meter: Above your head or: Beside the wall and assume that reading represents the task. The measurement location should match the objective. 4. Lux Measures Illuminance A lux meter can quantify illuminance at the measurement point. This converts: “Looks dark.” into: Measured Data That allows: Area A to be compared with: Area B or: Before Improvement with: After Improvement 5. Don't Rely Only on Human Perception Human eyes adapt. A person who stays in a darker area may gradually feel that the lighting is acceptable. Another person entering from a bright area may immediately say: “Very dark.” Measurement provides an objective comparison. 6. One Bright Spot Does Not Mean the Whole Area Is Well Lit Suppose a production table has: Bright centre but: Dark corners. One reading directly below the lamp may look good. But the actual work area may have poor lighting uniformity. Take representative measurements across the relevant area. 7. Build a Simple Lighting Map For example: Point A Left side Point B Centre Point C Right side Point D Worker position Point E Inspection position Now the factory can identify darker zones. 8. Measure Under Normal Operating Conditions If workers normally work: At night or: With roller shutters closed or: Without daylight then a measurement taken at midday with strong sunlight entering the factory may not represent the actual problem. Measure the condition that workers experience. 9. Daylight Can Change Factory Lighting A warehouse may look bright at: 11 AM but much darker at: 7 PM. If the complaint occurs during evening or night shift, measure during that shift. 10. Lighting Can Affect QA/QC This is where the topic becomes more than worker comfort. Inspection tasks may involve: Surface defects Scratches Colour differences Printing defects Labels Small components Assembly errors Poor lighting can make visual inspection more difficult. Therefore, lighting measurement can support both: Safety and: Quality Control 11. Inspection Lighting Should Be Evaluated at the Inspection Point Suppose QA says: “Operators keep missing small scratches.” Do not measure only general room lighting. Measure at the actual: Inspection Table and review the lighting arrangement for that task. The problem may be localized. 12. Shadows Can Create Problems Even When the Area Looks Bright A worker's body, equipment or machine structure may block light. This can create a shadow directly on the task. Therefore, the question is not only: “How bright is the room?” but also: “How well is the work surface illuminated?” 13. Machine Layout Changes Can Create New Dark Areas Factories change over time. A new: Machine Rack Partition Storage Area may block existing lighting. Workers may then report: “This area used to be okay, but now it is dark.” Ask what changed. 14. Dirty Fixtures Can Reduce Lighting Lighting performance can change because of: Dust accumulation Dirty covers Aging lamps Failed lamps Changed fixture orientation Obstruction This creates a maintenance opportunity. 15. Measure Before and After Cleaning Instead of saying: “The lights look brighter after cleaning.” measure: Before Cleaning ↓ Clean Fixtures ↓ Measure Again Now maintenance can quantify the improvement. 16. Measure Before and After LED Upgrade Factories frequently upgrade lighting. A useful verification pathway is: Existing Lighting Measurement ↓ Upgrade / Reposition Lighting ↓ Repeat Measurements at Same Work Points ↓ Compare This provides evidence of improvement. 17. Warehouse Lighting Needs Location-Based Measurement Warehouses can have very different lighting conditions at: Main aisle Between racks Picking area Packing station Loading bay Workers may need to read: Labels Part Numbers Documents Barcode Information The measurement plan should follow the work locations. 18. Example: Production Workers Say Their Area Is Too Dark Factory complaint: “Operators on Line B say they cannot see small parts clearly.” Possible pathway: Identify Work Surface ↓ Lux Measurement ↓ Map Multiple Points ↓ Compare Line A / Line B ↓ Check Shadows / Obstructions ↓ Corrective Action ↓ Measure Again Now the complaint becomes measurable. 19. Example: QA Keeps Missing Surface Defects Customer: “Our inspection team says scratches are difficult to see.” Possible pathway: Understand Inspection Task ↓ Measure Illuminance at Inspection Surface ↓ Check Lighting Direction / Shadow ↓ Compare Inspection Stations ↓ Improve Lighting Arrangement ↓ Measure Again This connects Environmental / Safety with QA/QC. 20. Example: Warehouse Is Dark at Night Customer: “Day shift is okay, but night-shift workers complain the warehouse is dark.” Possible pathway: Measure During Night Shift ↓ Map Aisles / Picking Areas ↓ Identify Low-Light Zones ↓ Lighting Improvement ↓ Repeat Measurements Do not use daytime conditions to answer a night-shift problem. 21. Example: Factory Wants to Upgrade to LED Customer: “We are changing the whole factory to LED. How do we know whether the improvement is enough?” Possible approach: Baseline Lux Mapping ↓ Lighting Upgrade ↓ Repeat Same Measurement Points ↓ Compare ↓ Keep Record This creates a clear before / after verification process. 22. Example: Customer Asks for a Lux Meter Customer: “Which lux meter should I buy?” MTM should first ask: What area are you measuring? Production, warehouse, inspection or office? What task is performed there? Spot checking or data recording? Do you need internal troubleshooting or a formal assessment? Then select the appropriate instrument. 23. Don't Measure Only Directly Under the Lamp This is a common mistake. The brightest point may be directly below the fixture. But the worker may operate: Two metres away. Measure the relevant work area. 24. Record the Measurement Conditions For useful comparisons, record: Location Time Lighting condition Work surface Production layout This helps ensure future measurements are comparable. 25. Build a Lighting Baseline Factories can include lighting checks in routine environmental monitoring. For example: Production Inspection Warehouse Packing Emergency / Access Areas Where Appropriate Periodic checks can identify changes before workers complain. 26. Lighting Can Be Part of a Larger Workplace Survey A factory EHS team may not need to investigate lighting alone. A broader workplace environmental survey can include appropriate: Lighting Noise Temperature Humidity Heat Stress Air Quality depending on the workplace. This creates a much stronger MTM solution. What Instruments Might Be Needed? Depending on the lighting problem, a solution may include: Lux Meter For suitable illuminance measurements. Data-Logging Lux Meter Where recording or repeated monitoring is required. Temperature / Humidity Meter For broader workplace environmental surveys. Sound Level Meter Where noise is also part of the workplace assessment. WBGT Meter Where heat stress is another worker concern. Indoor Air Quality Instruments Where air quality is also being investigated. Not every lighting problem requires multiple instruments. The correct solution depends on: Task + Worker + Location + Time + Measurement Objective Don't Search Only for “Lux Meter Malaysia” The actual factory questions are: Why can't workers see clearly? Which workstation is too dark? Is the inspection table adequately illuminated? Did the LED upgrade improve conditions? Are some warehouse aisles darker than others? The meter is only the measurement tool. The real objective is solving the workplace problem. From Lighting Complaint to Measurement Solution The better approach is: Worker / QA Complaint ↓ Identify Task ↓ Identify Work Surface ↓ Measure Representative Points ↓ Map Lighting ↓ Identify Dark Areas / Shadows ↓ Corrective Action ↓ Measure Again ↓ Keep Baseline This is a factory lighting investigation. One Lighting Complaint Can Connect Multiple MTM Solutions Workplace Safety Illuminance → Work Area Visibility QA/QC Inspection Lighting → Defect Detection Facility Maintenance Lighting Performance → Before / After Verification Environmental Monitoring Lux → Noise → Temperature → Humidity → Heat Stress This is the MTM positioning: Not: “We sell lux meters.” But: “Tell us what workers are trying to see and where the problem happens. MTM helps determine what should be measured.” Factory Lighting, Workplace Safety & QA/QC Measurement Solutions Malaysia MTM Precision supports: Manufacturing plants Production lines Assembly areas QA/QC departments Inspection stations Warehouses Packing areas Workshops EHS departments Safety officers Facility managers with measurement solutions covering: Illuminance Lux Measurement Workplace Lighting Lighting Mapping Before / After Verification Environmental Monitoring MTM's value is not: “Which lux meter do you want?” It is: “Tell us where workers cannot see clearly and what task they are performing. MTM helps determine what should be measured.” Workers Saying the Factory Is Too Dark? You do not need to start by choosing a lux-meter model. Tell MTM: Which area is too dark? What task is performed there? Where is the actual work surface? Does the problem happen during day or night shift? Is this a worker-safety, production or QA/QC problem? Do you need a baseline or before / after verification? We can help identify suitable measurement options for the problem. MTM Precision Sdn Bhd Showroom & Service Centre No. 29-1 & 29-2, Jalan Bandar 18, Pusat Bandar Puchong, 47160 Puchong, Selangor, Malaysia WhatsApp: +6016-660 7346 Email: mtmpre@yahoo.com Website: www.mtmpre.com.my Don't start with the lux meter. Start with what the worker needs to see. Tell MTM the workplace problem we'll help you determine what needs to be measured.
21 Aug 2026
