LED Spots for Lightening a Sales Hall – Part 1 Of 4

Hello dear blog readers, this time I have a pretty big issue for you, which I will share on several Blog postings. But don’t worry. Always a small part is released per week, thus it remains exciting until the very end!

LED Spots for Lightening a Sales Hall - Part 1 Of 4
Some time ago I was contacted by a company. Namely, which have complained that they have so called “dark corners”, get them just not bright enough with their current lighting. Moreover, clothes are displayed right there. So double so bad actually. Non-illuminated clothes… HM, everything else as well. The problem is that can the installed fluorescent lights give off enough light and the costs incurred by this are not deliberately lit. It is rather a certain ambient lighting, but nothing that can direct the eyes at certain things. As so, clothes should be lit, a lighting must be found so that can simulate daylight, so that all colors as well are visible. Daylight has approximately 6500 K light color and a CRI value of 100. At a standard illumination with around 6000 Kelvin color temperature is approximately Ra 75 color cons gift value (CRI) of LEDs. Not so very sparkling, if pursuing a CRI of 100. But that should be sufficient in our case since it should be an additional lighting system and the installed fluorescent lights have a quite good CRI value. I don’t know what is exactly that. However, the company told me that special lamps are, and should thus have a very high value of CRI. The LEDs should more not lighten only.

The Lighting Order of Clothing Business

A LED lamp or lamp system to develop that one doesn’t dazzle, brightly lit but the salesroom, or the clothes and allows a specific illumination of the clothes. A cool white, so light-colored lighting is preferred.
I aims to develop only the lamp itself, so the company on their own or with my help can recreate this lamp.

This Lighting Was Present in the Clothing Business

Be up-to-date clothes with 35 W-Halogenlampen vertically from above, approximately 40 cm away lit up, what works but rather something suboptimal because the direct light from above wide shadow casts and is very yellow. Also, a system of fluorescent lighting is installed in the entire sales Hall which should secure the ambient lighting. “Daylight” fluorescent tubes with a light color this is already very good OSRAM of approx. 6500 Kelvin. There were also times 500 W halogen lamps in use, however these were switched off but again after a short time. The customers were blinded by this very strong emitters but enormously.

The Reasoning for My Development

I made already some LEDs and have collected this also already quite a few experiences in this area. This time it’s anything but. I have never developed a lamp which was trimmed only on luminosity. Therefore I had to find out first as all of what is for a light intensity needed to illuminate the clothes effectively and bright. It was not so easy, because I had still no reference for such a case. Only thing that was clear is that it must be a neutral white or cool white LED, to get the desired light. Neutral white comes in question, because usually a neutral White has a higher CRI value. Each warmer so the light color, usually also the CRI values are better. Warm white LEDs have a much better color rendering index (CRI), but the disadvantage that they would not so light can shine and with the cold white “daylight” bite ambient lighting. But the ambient lighting is secured Yes already by the OSRAM fluorescent tubes. That’s why you need when the LED make sure lighting actually no longer as extreme on the color reproduction. If the LED was alone responsible for the illumination, the CRI value would have a much larger impact on the perception of color. A CRI of 75 is therefore as sufficiently perceived.

This Led Come in the More Detailed Selection

Well ok. If you start from zero, has a bunch of great man really work to do and must rummage through which all data sheets, until it has reduced his selection for that one can think of the design. I have made me so on the search and posted out all LEDs, which are able to achieve a luminous flux of more than 1000 lumens.

Cree:

  • 3 x XML (module) 2900 l m max
  • MK-R (single chip) 1770 l m max
  • 4 x  M C E (module) 3000 l m max
  • 4 x X P G (module) 1450 l m max

Osram:

  • OSRAM Duris E5 square 2100Lumen max

Luminus:

  • LUMINUS SST-50-W WJ 1250lm max

Seoul:

  • Acrich2 13W module 5600 K 1300lm
  • Acrich2 17W module 5000 K 1700lm

Bridgelux:

  • Bridgelux’s Rectagle array CRI 70 cool white 10W 1180lm
  • Bridgelux’s Rectagle array CRI 70 cool white 15W 1725lm
  • Bridgelux’s Rectagle array CRI 80 cool white 25W 2760lm

Phew, a very nice selection…

The Advantages and Disadvantages of These Leds

The Luminus is was quite ok, but it is not on a motherboard available. I would have to solder them with a special soldering process and I can’t do that. In addition, it costs € 35 and has only maximum 1300 lumens. I guess not really something just the price-performance ratio.
It looks different when the Bridgelux. However, the Board is rectangular and therefore not really easy to use. Also, I don’t know how I can install a suitable optics, so that the light falls sufficiently bundled on the display. So it falls away ever.
The OSRAM Duris can produce while a high luminous flux, but only, because the many small LEDs to a module have been put together. How to do directional light from it, I don’t know. This LED Array would rather serve a general illumination, but not to selectively illuminate objects. So the OSRAM also falls away.
It is really very hard to locate the right LED to a wide range and since I’ve written so much text and need now a little time to dig me the data sheets, I say just now: to be continued… next week. The new contribution will be linked at this point then of course. Until then enjoy reading our other numerous contributions on the topic LED lamps self-designed.

More from This Series of Articles

Update: You’re lucky that you’re reading this post now, because all the posts are now online. Here the table of contents:

  • Part 1: the project whitening a sales Hall
  • Part 2: The choice of the LED and the heat sink
  • Part 3: Housing, lens and costs
  • Part 4: The shadow and the diffusion disc

Gallery

60leds mr16 spot led lamp

60leds mr16 spot led lamp

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Mr. Beams LED Spot Light & Reviews

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IP54 60 Watt 5280lm LED Highbay Lighting 120°For Warehouse ...

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12V SUV Motorcycle Spotlight LED Car Van Spotlight Hawkeye ...

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led light 3x2w, led light 3x2w Manufacturers in LuLuSoSo ...

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Mr. Beams LED Spot Light & Reviews

Mr. Beams LED Spot Light & Reviews

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g spot photo

g spot photo

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Led Green Light International

Led Green Light International

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Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head …

Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head ...

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1x Round 7" 75W LED Headlight Projector Daymaker HID LED ...

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Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head …

Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head ...

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Quality halogen track lighting

Quality halogen track lighting

Source: www.insurersguide.com

1x Round 7" 75W LED Headlight Projector Daymaker HID LED …

1x Round 7" 75W LED Headlight Projector Daymaker HID LED ...

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led worklight

led worklight

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Led Green Light International

Led Green Light International

Source: www.bizrice.com

Mr. Beams LED Spot Light & Reviews

Mr. Beams LED Spot Light & Reviews

Source: www.wayfair.com

Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head …

Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head ...

Source: www.ebay.ie

own led light bar

own led light bar

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Angel Eyes COB Halo Ring Light Car Headlight SMD LED Head ...

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grille spot bulbs

grille spot bulbs

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