4W LED backlight bars with a 30-bar roll specification
Plan the lighting quantity using the per-bar and complete-roll figures. SL-BM079-1200 is a 621 × 20 × 11mm LED backlight bar specified at 4W and 400 lm per bar, with eight LEDs and a 24V DC input. The product sheet lists 30 bars per roll and 120W for the complete roll.
For advertising-lightbox manufacturers, fabric-display builders and wholesale component purchasers, include both the required bar count and complete-roll quantity in the enquiry. Select the white-light version, connection layout and packing scope with the sample before arranging bulk supply.
621mm backlight bar and roll technical specification
| Specification | SL-BM079-1200 |
|---|
| Ordering model in product sheet | SL-BM079-1200 |
| Complete bar dimensions | 621 × 20 × 11mm |
| Input | 24V DC |
| Power per bar | 4W |
| Luminous flux per bar | 400 lm |
| LED quantity per bar | 8 LEDs |
| Bars per roll | 30 bars |
| Power per complete roll | 120W |
| Optical range in sheet | 170–180° |
| White-light order ranges | 3000–3500K / 4700–5300K / 6000–7000K / 9000–16000K |
| Substrate | Aluminium |
| Original-sheet CRI reference | ≥70 |
| Current colour-rendering order option | CRI 90+ white LEDs available; specify with the order |
Separate bar quantities from complete-roll requirements
The 4W power and 400 lm output figures apply to one bar. The complete-roll specification is 30 bars and 120W. State whether the requested quantity is counted in individual bars or complete rolls so the quotation and packing list use the same unit.
Send the required arrangement, bar grouping and cable route with the lightbox drawing. Confirm the electrical layout, power unit, mating leads and permitted connection quantity for the supplied version. List any required accessories as separate quotation items.
White-light, optical and construction selection
Four white-light order ranges are listed: 3000–3500K, 4700–5300K, 6000–7000K and 9000–16000K. Select the required version and approve the sample appearance and technical data for the intended graphic or displayed goods.
The original sheet lists CRI ≥70. CRI 90+ white LEDs are available as a current order option; specify the required selection and obtain data for the quoted version. The sheet gives a 170–180° optical range, while the lens artwork illustrates 180° optics. Confirm the optical version with the order.
The construction pictures show an aluminium support and separate lenses. Use the listed complete 621 × 20 × 11mm dimensions when checking the assembly against the enclosure drawing.
Advertising lightbox and fabric-display projects
The application artwork includes fabric or film displays, commercial advertising lightboxes, retail signboards and illuminated ceiling concepts. Provide the face material, enclosure and proposed bar positions to assess a sample layout.
Wholesale orders start at 20 pcs and higher quantities qualify for lower unit prices. For roll supply, include the total bar count and complete-roll requirement to confirm the quotation unit. Samples are available, with charges and destination shipping agreed separately. Standard lead time is 12–18 days; custom work and transit are confirmed separately. OEM, ODM and private-label enquiries are supported.
Technical documents for the destination market
Request current model-specific technical and compliance documents for the required destination market. The original document illustrations are provided below; confirm their scope and applicability to the version quoted with the order.
Backlight bar roll purchasing questions
Is 120W the power of a single 621mm bar?
One bar is specified at 4W. The 120W figure applies to the complete 30-bar roll listed in the product sheet. State bar and roll quantities clearly when requesting pricing.
Which model should be used for the 30-bar roll enquiry?
Use SL-BM079-1200, the model printed in the product sheet. Include the required white-light range, total bar count, roll quantity and connection requirements to identify the supply configuration.
Can the roll be supplied with CRI 90+ white LEDs?
CRI 90+ is available as a white-light order option. Specify the white-light range and CRI requirement so the sample and technical data match the version selected for bulk production.
What is needed to quote a complete lightbox component order?
Include the enclosure drawing, face material, bar layout, white-light and optical selection, electrical requirements and delivery country. List the power unit, leads, assembly grouping, marking and packing items you require.
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