Lights

Bar lights

Bar lights are the flexible building block of a vision station: aim one at an angle for dark-field effects, pair two for even side lighting, or use a four-bar square for a large-area ring.

Shop by colour: Red bar lights · Blue bar lights · Green bar lights · White bar lights · Infrared bar lights · UV bar lights

1403 models Configure a systemAll lights
Bar lights

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LS-BAR-1262Bar Light, 192 x 28 mm, White White180 mm × 22 mm192 mm × 28 mm × 27 mm5.8 W--$279.00 Ships in 2-3 weeks
LS-BAR-1265Bar Light, 237 x 28 mm, White White225 mm × 22 mm237 mm × 28 mm × 27 mm7.2 W--$269.00 Ships in 2-3 weeks
LS-BAR-1266Bar Light, 237 x 38 mm, Blue Blue225 mm × 32 mm237 mm × 38 mm × 27 mm9.8 W465 nm-$269.00 Ships in 2-3 weeks
LS-BAR-1263Bar Light, 192 x 38 mm, White White180 mm × 32 mm192 mm × 38 mm × 27 mm9.8 W--$279.00 Ships in 2-3 weeks
LS-BAR-1259Bar Light, 147 x 28 mm, White White135 mm × 22 mm147 mm × 28 mm × 27 mm4.3 W--$259.00 Ships in 2-3 weeks
LS-BAR-1258Bar Light, 147 x 18 mm, White White135 mm × 12 mm147 mm × 18 mm × 27 mm2.2 W--$259.00 Ships in 2-3 weeks
LS-BAR-1261Bar Light, 192 x 18 mm, White White180 mm × 12 mm192 mm × 18 mm × 27 mm2.9 W--$279.00 Ships in 2-3 weeks
LS-BAR-1253Bar Light, 57 x 28 mm, White White45 mm × 22 mm57 mm × 28 mm × 27 mm1.4 W--$159.00 Ships in 2-3 weeks
LS-BAR-1260Bar Light, 147 x 38 mm, White White135 mm × 32 mm147 mm × 38 mm × 27 mm6.5W--$259.00 Ships in 2-3 weeks
LS-BAR-1256Bar Light, 102 x 28 mm, White White90 mm × 22 mm102 mm × 28 mm × 27 mm2.9 W--$219.00 Ships in 2-3 weeks
LS-BAR-1255Bar Light, 102 x 18 mm, White White90 mm × 12 mm102 mm × 18 mm × 27 mm2.6 W--$219.00 Ships in 2-3 weeks
LS-BAR-1257Bar Light, 102 x 38 mm, White White90 mm × 32 mm102 mm × 38 mm × 27 mm2.9W--$219.00 Ships in 2-3 weeks
LS-BAR-1240Bar Light, 1300 x 40 mm, White White1172.6 mm × 31.6 mm1188 mm × 40 mm × 30 mm116 W-24 VDC$1,479.00 Ships in 2-3 weeks
LS-BAR-1079Bar Light, 260 x 260 mm, White White-260 mm × 260 mm × 73 mm34.5 W--$319.00 Ships in 2-3 weeks
LS-BAR-1254Bar Light, 57 x 38 mm, White White45 mm × 32 mm57 mm × 38 mm × 27 mm2.4 W--$159.00 Ships in 2-3 weeks
LS-BAR-1252Bar Light, 57 x 18 mm, White White45 mm × 12 mm57 mm × 18 mm × 27 mm0.7 W--$159.00 Ships in 2-3 weeks
LS-BAR-1251Bar Light, 1800 x 40 mm, White White1622.6 mm × 31.6 mm1638 mm × 40 mm × 30 mm162.2 W-24 VDC$1,939.00Quote Ships in 2-3 weeks
LS-BAR-1077Bar Light, 112 x 112 mm, White White-112 mm × 112 mm × 36 mm8.8 W--$229.00 Ships in 2-3 weeks
LS-BAR-1078Bar Light, 154 x 154 mm, White White-154 mm × 154 mm × 42 mm11.5 W--$259.00 Ships in 2-3 weeks
LS-BAR-1076Bar Light, 78 x 78 mm, White White-78 mm × 78 mm × 25 mm3.6 W--$189.00 Ships in 2-3 weeks
LS-BAR-1344370 x 14 mm LED bar light, 380 x 21 x 31.5 mm White, Blue, Red, Green-380 x 21 x 31.5 mm---$389.00 Ships in 2-3 weeks
LS-BAR-1345370 x 14 mm LED bar light, 380 x 21 x 29 mm White, Blue, Red, Green-380 x 21 x 29 mm---$389.00 Ships in 2-3 weeks
LS-BAR-1343295 x 14 mm LED bar light, 305 x 21 x 29 mm White, Blue, Red, Green-305 x 21 x 29 mm---$319.00 Ships in 2-3 weeks
LS-BAR-1341220 x 14 mm LED bar light, 230 x 21 x 29 mm White, Blue, Red, Green-230 x 21 x 29 mm---$359.00 Ships in 2-3 weeks

How to choose a machine vision bar light

A bar light is a straight row of LEDs in a narrow housing. It is the most flexible light in a vision cell: one bar at a steep angle acts as a bright directional front light, one at a shallow angle grazes the surface to raise texture, two or four bars around the part make a square ring of any size, and a long bar lights a whole conveyor width. Choose by geometry first, then optics, colour and drive.

1. Length

The lit length should exceed the field of view along the bar by a margin of about 10-20 % at each end, because output falls off near the end caps. For several bars around a part, size each bar to the side of the field it lights. Long bars over a conveyor must cover the full belt width the camera sees, including part position tolerance.

2. Angle and distance: bright field or dark field

Mount angle decides what the camera sees:

  • Steep (bright field): the bar sits near the camera axis. Flat, matte surfaces look evenly bright; good for print, labels and colour checks.
  • Low angle (dark field): the bar sits low and to the side, 10-30° above the surface. Flat areas stay dark and scratches, embossing, dents and edges light up. Used for engraved codes, raised text and surface defects.

Working distance matters too: output per area drops with distance, and a bar placed far away lights a wider strip less evenly. Where a working range is stated it is typically 30-500 mm.

3. Beam angle: lensed or diffused

Many bars take a lens over the LEDs. A narrow beam (10-20°) puts more light on a strip far from the bar; a wide beam (36-55°) lights a broader area close to the bar. Some bars combine two beams (45° plus 15°). A diffused bar without lenses has a softer, more even output that reduces hot spots on semi-gloss parts. Pick the beam from the distance and the width of strip you need to light.

4. Colour

  • Red (625 or 660 nm): the default for mono cameras; easy to separate from room light with a filter.
  • Blue (455-470 nm): more contrast on metal and for fine scratches; sharper at high magnification.
  • Green, cyan, amber: pick the colour that darkens the feature: light of the opposite colour makes a coloured mark look dark on a mono camera.
  • Infrared (850 or 940 nm): suppresses printed colour and passes through some plastics; invisible to operators.
  • UV (365-405 nm): makes fluorescent inks, glues and coatings glow.
  • White: for colour cameras.

5. Drive, housing and wiring

Bars without a driver need a light controller. Bars with an internal or in-line driver run on 24 V DC, dim with an analog voltage and, with a PNP or NPN trigger input, can be pulsed above their continuous rating to freeze moving parts. Some bars can be daisy-chained so several share one cable run. For wet or wash-down areas choose IP65 to IP69K and, where offered, a stainless steel housing; IP50 is for dry cabinets. A few models are rated risk group 2 under IEC 62471: check the rating and shield operators from the direct beam.

What the range covers

ParameterRange in this category
Lit lengthFrom about 35 mm to about 2.5 m
Lit widthAbout 10-57 mm
Beam angles (lensed bars)10, 14, 20, 25, 32, 36, 40, 55°, and 45° + 15°; diffused versions without lens
ColoursWhite, blue 455/470 nm, cyan 505 nm, green 520/530 nm, amber 590 nm, red 625/660 nm, IR 850/940 nm, UV 365-405 nm
Supply24 V DC on almost every model
ProtectionIP50 to IP69K; aluminium or stainless steel housings

Browse by colour: white, red, blue, green, infrared and UV bar lights.

Typical applications

  • Engraved, stamped or laser-etched codes and characters, lit at a low angle.
  • Scratches, dents and flatness defects on machined or painted surfaces.
  • Label presence, position and print on boxes and bottles passing on a conveyor.
  • Two or four bars as a large, adjustable ring light for parts too big for a ring light.
  • Fluorescent glue bead and coating checks with UV bars.

Common mistakes

  • Choosing a bar only as long as the part. The ends of the bar are dimmer, so the edges of the field come out darker.
  • Mounting the bar where its mirror reflection lands in the lens on shiny parts. Move it so the specular reflection misses the camera, or use a polarized bar with a polarizer on the lens.
  • Using a narrow beam at short distance: the light lands as a thin stripe instead of an even area.
  • Expecting one bar to light a curved or crinkled shiny part evenly. That needs a dome light.
  • Wiring a bar without a built-in driver to a plain power supply when its data sheet calls for a controller. Check the drive type on the product page before wiring.

Questions

Bar light or line scan light?
Bar lights light an area for area-scan cameras and are general purpose. Line scan lights focus a high-intensity line onto the narrow strip a line scan camera reads at high line rates.

How many bars do I need?
One for directional or low-angle light from one side. Two opposite bars balance shadows. Four bars around the part behave like a square ring light with adjustable angle.

Can I strobe a bar light?
Yes: bars with a trigger input strobe from the camera or sensor signal; others strobe through a strobing controller. Check the strobe frequency and shortest pulse against the line speed.

Where do I start?
Pick the light type in the lighting guide, then configure the system so camera, lens, light and controller fit together.