| Product Size | Overall height and width | Confirm the exact finished dimensions, including feet, base plates, access doors, and cable outlets. Allow additional clearance for transport and installation. | Dimensioned drawing, elevation view, and installation footprint. | Required |
| Product Weight | Weight of each letter and base | Use the actual shipping and installed weight rather than an estimated visual weight. The supporting surface must be checked for the combined dead load. | Weight schedule for every letter, base, ballast, and fixing component. | Required |
| Stability | Center of gravity and tipping resistance | A tall, narrow letter may require a wider base, concealed ballast, mechanical anchoring, or a connected support frame. Stability must be assessed for the complete assembled unit. | Base detail, center-of-gravity information, anti-tip method, and stability calculation. | Required |
| Wind Load | Outdoor wind exposure | Obtain the local basic wind speed and exposure category from the applicable building regulations. For preliminary review, wind pressure can be estimated by q = 0.613 × V² in N/m² when V is in m/s; final design requires a qualified calculation. | Wind-load calculation, local design wind speed, projected area, fixing details, and engineer review where required. | Required |
| Base Fixing | Anchors, ballast, and substrate | Concrete, paving, soil, decking, and temporary event flooring have different load capacities. Anchor type, embedment, edge distance, and pull-out resistance must match the substrate. | Anchor schedule, base-plate drawing, substrate information, and installer method statement. | Required |
| Electrical Input | Supply voltage and frequency | Verify whether the system accepts the local mains supply, commonly 100–120 V or 220–240 V AC at 50/60 Hz. Do not connect equipment outside its marked input range. | Electrical rating label, wiring diagram, installation manual, and regional conformity documentation. | Required |
| LED Circuit | Low-voltage LED modules and drivers | Many illuminated letters use 12 V DC or 24 V DC LED modules supplied by remote or internal drivers. The LED voltage must match the driver output voltage. | LED module voltage, driver output rating, wiring diagram, and polarity instructions. | Verify |
| Power Demand | Total wattage | Calculate the total load by adding the marked wattage of every letter, driver, controller, and accessory. Do not size the circuit from the LED module wattage alone. | Per-letter wattage schedule and maximum system wattage. | Required |
| Circuit Capacity | Operating current and circuit margin | For single-phase systems, use I = P ÷ V. Select circuit protection and conductors according to local electrical rules, installation method, ambient temperature, and continuous-load requirements. | Load calculation, breaker rating, conductor size, voltage-drop calculation, and electrician approval. | Required |
| Voltage Drop | Long cable runs | Check voltage at the furthest letter under full load. Excessive voltage drop can cause uneven brightness, flicker, or driver failure; the permitted value depends on local electrical rules and the equipment design. | Cable length, conductor cross-section, load current, and voltage-drop calculation. | Verify |
| Protection | Residual-current and ground-fault protection | Outdoor and damp-location circuits generally require additional residual-current or ground-fault protection. The trip rating and test requirements must follow the applicable local code. | Protection-device specification, earthing diagram, test procedure, and commissioning record. | Required |
| Grounding | Protective earth and bonding | All accessible conductive parts that could become energized must be bonded or grounded where required. Class II or double-insulated equipment must be identified and installed as specified. | Grounding continuity test, wiring diagram, enclosure classification, and inspection record. | Required |
| Ingress Protection | IP rating for the actual location | Use the IP code defined by IEC 60529 or the applicable national equivalent. Outdoor exposure, rain direction, splash, dust, and temporary immersion risks must be considered; an IP rating is not a substitute for correct installation. | Enclosure IP rating, test report or declaration, gasket details, and cable-gland specification. | Verify |
| Drainage | Condensation and water drainage | Enclosures should prevent trapped water and provide the drainage or ventilation specified by the design. Drain holes must not compromise the required protection level. | Section drawings, drainage locations, breather details, and maintenance instructions. | Required |
| Materials | Structure, finish, and corrosion resistance | Select materials and coatings for the site environment, including coastal salt, industrial pollution, humidity, cleaning chemicals, and temperature variation. | Material specifications, coating system, fastener grade, and corrosion-protection details. | Verify |
| Thermal Safety | Heat dissipation and clearance | Maintain the manufacturer’s clearance around drivers, ventilation openings, and heat-producing components. Do not cover vents or place combustible materials against hot surfaces. | Maximum surface temperature, thermal test data, ventilation requirements, and clearance diagram. | Required |
| Lighting Performance | Brightness, color, and uniformity | Specify the required color temperature, dimming range, brightness limit, and acceptable luminance uniformity. Outdoor displays may be subject to local light-pollution or nuisance-light rules. | Lighting schedule, sample section, dimming method, and nighttime commissioning plan. | Verify |
| Controls | Timer, dimmer, sensor, or controller | Confirm control voltage, maximum connected load, enclosure location, emergency shutoff method, and whether automatic dusk-to-dawn operation is required. | Control schematic, programming settings, operating instructions, and manual override procedure. | Verify |
| Installation | Assembly sequence and lifting | Large letters may require multiple installers, lifting equipment, temporary bracing, exclusion zones, and a defined assembly sequence. Never lift from LED faces, trim, or unapproved points. | Lift plan, handling points, assembly instructions, equipment list, and risk assessment. | Required |
| Public Safety | Edges, trip hazards, and access | Protect sharp edges, secure loose cables, maintain required pedestrian clearance, and prevent public access to electrical compartments and moving or removable parts. | Site layout, accessibility review, cable-routing plan, edge-protection details, and barrier plan. | Required |
| Compliance | Applicable electrical and building requirements | Check the electrical, structural, fire, accessibility, signage, planning, and temporary-event requirements for the installation jurisdiction. Requirements differ by country, city, property type, and installation duration. | Permits, inspection requirements, declarations of conformity, test certificates, and engineer sign-off where applicable. | Required |
| Maintenance | Service access and replacement | Provide safe access to drivers, connectors, LED modules, fuses, and drainage points. Define isolation, cleaning, inspection, and replacement procedures before purchase. | Maintenance manual, spare-parts list, access-panel drawings, and recommended inspection intervals. | Verify |
| Purchasing | Scope, warranty, and acceptance criteria | The quotation should state dimensions, materials, finish, light output, power consumption, protection rating, fixing method, delivery condition, installation scope, testing, and warranty exclusions. | Detailed quotation, approved drawings, inspection checklist, delivery schedule, and written warranty terms. | Required |