Dahua LS550UEM-EF 55-inch FHD Video Wall Display Unit

Name: Dahua LS550UEM-EF 55-inch FHD Video Wall Display Unit
Brand: Dahua
SKU: dahua-ls550uem-ef
Availability: InStock

Overview

The Dahua LS550UEM-EF is a 55-inch full HD display unit for building video walls, with a 0.88mm seam between adjacent panels, 500 cd/m² brightness and a rating for continuous operation. Its HDMI daisy chain, RS232 and infrared control and built-in picture splicing suit control rooms, lobbies and meeting spaces across Qatar. Request a quote for your panel count and wall layout.

What the LS550UEM-EF is built to do

The Dahua LS550UEM-EF is a 55-inch full HD display unit from the Essential Series, made to be placed side by side with other panels so they act as one large picture. Its 1920×1080 ADS LCD panel and direct LED backlight deliver 500 cd/m² brightness and a 1,200:1 contrast ratio, with a 10,000K colour temperature and 8-bit colour depth. The surface is anti-glare, with 25% haze and 3H hardness, which helps in rooms where lights or windows reflect onto the screen.

The unit is designed for continuous 24/7 operation and lists an MTBF of 50,000 hours, so it suits screens that stay on through the working day and beyond. That matters for a control room, a monitoring centre or a lobby display that is never switched off.

Bezel, splicing and layout

Narrow edges are the main reason to choose this model. Two adjacent panels meet at a seam formed by the 0.48mm top and left edges and the 0.4mm bottom and right edges, which together give the 0.88mm gap quoted for the model. On a multi-panel wall, that thin seam keeps the image looking continuous and lets content cross the joins with minimal distraction. The built-in picture splicing function supports this tiled layout, and the factory calibration aims for consistent colour across panels, which matters when several units show the same content.

Where it fits in Qatar

In Doha, a security or operations team might use a grid of these units in a command centre to monitor cameras and dashboards around the clock. A hotel or mall in West Bay or Lusail could use a smaller wall in a lobby or atrium to show wayfinding or event information. A company meeting room in Msheireb or West Bay can use a single unit as a large display, connected to a laptop over HDMI.

The inputs cover common sources: HDMI, DVI-D, VGA, BNC composite video, two USB ports, audio and infrared. Two HDMI outputs support daisy chaining, so a source can pass through one panel to the next. Control is available by infrared or RS232, and the unit supports remote control from a computer.

Power, heat and installation planning

The power input accepts AC 100 V to 240 V at 50/60 Hz, which covers Qatar's 240 V mains. Typical consumption is 166 W and maximum is 180 W, with standby below 0.5 W. The EU energy efficiency class is G.

The listed operating temperature is 0 °C to 50 °C, with 20% to 80% relative humidity and no condensation. Qatar summers can exceed 45 °C, so plan airflow around each unit, keep it away from direct sunlight and confirm the room's cooling with the SmartRooms Qatar team before installation. The unit can be floor-standing or wall-mounted, using a 600×400 mm VESA pattern with M6 fixings. Net weight is 24.1 kg and gross weight 33.9 kg, with product dimensions of 1210.5 × 681.3 × 115.8 mm. Because of the weight, a site survey is advisable to confirm wall structure and bracket type before a wall of units is ordered.

Getting a quote

SmartRooms Qatar supplies the LS550UEM-EF across Qatar, with delivery to all eight municipalities, professional installation and a free site survey. Quotations are usually issued within one working day, and we accept purchase orders (LPOs), government tenders and payment by bank transfer, cheque or purchase order. Request a quote with your panel count, wall size and location, and we will confirm the right configuration.

Highlights

55-inch 1920×1080 ADS LCD panel with direct LED backlight
0.88mm seam between adjacent panels (0.48mm and 0.4mm edges)
500 cd/m² brightness and 1,200:1 contrast ratio
Designed for continuous 24/7 operation, MTBF 50,000 hours
HDMI daisy chain plus RS232 and infrared control
Floor-standing or wall-mounted; VESA 600×400 mm, M6

Plan your video wall

Rows3

Columns3

Wall size about 3.65 × 2.05 m · 9 panels

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

30 specifications · Source: manufacturer · checked Oct 2026

Model1

Model: DHI- LS550UEM-E F

Display14

Diagonal Size: 55"(16:9)
Panel Type: ADS
Resolution: 1920×1080 (FHD)
Bezel Width: 0.48mm (T/L) , 0.4mm (B/R)
Backlight: Direct LED
Brightness: 500 cd/ m²
Contrast Ratio: 1200:1
Pixel Density: 40dpi
Viewing Angle: H178°, V178°
Response Time (G-to-G): 8ms
Color Depth: 8bit (16.7M)
Color Temperature: 10,000K
Surface Treatment: Haze 25%, 3H
MTBF: 50,000h

Signals2

Input: CVBS(BNC)×1, VGA(D-Sub)×1, DVI-D×1, HDMI×1, RS232×1, USB×2, Audio×1, IR×1
Output: CVBS(BNC)×1, RS232×1, HDMI×2, VGA×1, Audio×1

General13

Power Supply: AC100V ～ AC240V, 50/60 Hz
Power Consumption (Typical): 166W
Power Consumption (Max.): 180W
Energy Efficiency Class (EU): G
Installation Mode: Floor-standing, wall-mounted
Control Mode: Infrared, RS232 dual mode, supporting remote control by computer
Wall Mount VESA: 600×400mm, M6
Net Weight: 24.1kg (53.1Ib)
Gross Weight: 33.9kg (74.7Ib)
Product Dimension (W×H×D): 1210.5mm×681.3mm×115.8mm (47.7"×26.8"×4.6")
Package Dimension (W×H×D): 1360mm×945mm×280mm (53.5"×37.2"×11.0")
Operating Environment: Temperature 0 ℃ ~+50 ℃
Humidity: 20%RH~80%RH (non-condensing)

Downloads

1 file from the manufacturer

PDF Datasheets LS550UEM-EF_Datasheet_2024.11.pdf 630 KB

Questions about LS550UEM-EF

What is the Dahua LS550UEM-EF designed for?

It is a 55-inch full HD display unit built to be tiled with other panels into one large picture. Its 0.88mm seam and suitability for continuous 24/7 operation make it a fit for surveillance centres, command rooms, meeting spaces and commercial displays. A single unit also works as a standalone screen in a boardroom or reception area when connected to a laptop or media player over HDMI.

How narrow is the bezel, and what is the gap between two panels?

The product name quotes a 0.88mm bezel-to-bezel design. The datasheet lists 0.48mm for the top and left edges and 0.4mm for the bottom and right edges, so the two edges meeting at a seam add up to the 0.88mm figure. On a wall of several units, that thin seam keeps the image looking continuous. Confirm the final seam width with the SmartRooms Qatar team when you request a quote.

Can the LS550UEM-EF run a control room display around the clock?

Yes. The manufacturer describes it as suitable for continuous 24/7 operation, with a listed MTBF of 50,000 hours and a thermal design intended to extend lifespan. A monitoring team in an operations room in the Industrial Area, for example, can keep a grid of these panels on through every shift. Keep each unit within its listed 0 to 50 °C operating range and check that the room's ventilation can handle the heat from the wall.

Can I install it near windows or in a hot, unshaded space in Qatar?

The listed operating temperature is 0 to 50 °C, with 20% to 80% relative humidity and no condensation. Qatar summers can go above 45 °C, so a lobby with sun-facing glass or an unairconditioned warehouse office would need careful planning. The data does not list a rating for outdoor use. Before installation, confirm the room's environment with the SmartRooms Qatar team and provide airflow around the unit.

Is 500 cd/m² bright enough for a meeting room with daylight?

The panel has a rated brightness of 500 cd/m², a 1,200:1 contrast ratio and an anti-glare surface with 25% haze and 3H hardness. That suits many rooms with blinds closed or lights on, such as a boardroom in West Bay. A screen exposed to direct sunlight is harder to manage, so position the panel away from the window and check glare on site during the free site survey.

What inputs and outputs does it have?

Inputs are HDMI, DVI-D, VGA, BNC composite video (CVBS), two USB ports, an audio input, an infrared input and RS232. Outputs are two HDMI, one VGA, one CVBS, one RS232 and one audio output. The two HDMI outputs support daisy chaining, so one source can feed several panels in a row, with each unit passing the signal on to the next.

How do I control the display remotely?

It has dual control modes, infrared and RS232, and the manufacturer lists support for remote control from a computer. In a command room, the RS232 connection lets a central control system switch sources or adjust the display from one point. Infrared suits a single meeting room where a handset is preferred. Confirm the control software and cabling you need when you request a quote.

How much power does it draw, and will it work on Qatar's mains?

The power input is listed as AC 100 V to 240 V at 50/60 Hz, which covers Qatar's 240 V mains. Typical consumption is 166 W, maximum 180 W, and standby under 0.5 W. The EU energy efficiency class is G. When several units share one wall, the typical and standby figures help you plan power circuits and estimate running costs.

What mounting options are there, and how heavy is the unit?

It can be floor-standing or wall-mounted. The wall mount pattern is 600×400 mm with M6 fixings. The net weight is 24.1 kg and the gross weight 33.9 kg, with product dimensions of 1210.5 × 681.3 × 115.8 mm. For a wall of several units in a Msheireb meeting room or a Lusail retail atrium, a site survey confirms the wall structure and bracket choice before the order is placed.

What does the picture splicing function do?

The built-in picture splicing function lets a group of these panels show one image across the wall, rather than each displaying its own content. Combined with the 0.88mm seam, it is the main reason to choose this unit for a video wall rather than a standalone screen. The data does not name the source or controller that drives a wall, so ask for a quote that states exactly which equipment is included.

Can a school or government buyer order it through an LPO or tender?

Yes. SmartRooms Qatar accepts purchase orders (LPOs) and government tenders, including those issued through Monaqasat, with payment by bank transfer, cheque or purchase order. A school in Al Wakrah fitting out a new media room, or a government office in Doha standardising its displays, can request one quotation covering all units. Quotations are usually issued within one working day, and the products are covered by the manufacturer's warranty.

Is this model suitable for a single large display in a corporate lobby?

A single unit in a reception or lobby benefits from the 178° horizontal and vertical viewing angles, so visitors approaching from the side can still read the content. The 500 cd/m² brightness suits a lobby with moderate light, while a lobby facing direct sun needs more planning. Wall mounting uses a 600×400 mm VESA pattern, and a floor-standing option is also listed. Request a quote and a free site survey can be arranged before fixing.