General questions
Question:
What happens with my personal data given to you?
Barthelme will use the given data of you for processing your request and to follow your order. Further one we will use your data to inform you about customer and product information. The data won't be sold or given to third parties apart from delivery issues. This agreement can be countermanded anytime please write us an Email to: info(at)barthelme.de
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Question:
Engergie consumption of a google research
One Research on Google consumes 4 Watt per hours. This equates the power consumption of an engergie lamp lighting for one hour.
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Question:
Do you mind if I show up without an appointment?
Private customers are only consulted in the presence of planners or electricians.
We also consult electricians, having an arranged appointment.
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Question:
To whom are you selling to?
Our target group are wholesalers and retailers, shop- and booth builders, architects, light designer, etc.
We don't sell directly to privat parties - this also includs technical consulting!
Please contact your local specialist shop and ask him about our products. Thank you for your understanding and your interest.
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Product-specific
Question:
The software of Chromoflex III RC doesn't start?
The software is configured so that it only works when the USB dongle is plugged in. Unplugging and plugging in again during the system run also doesn't work.
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Question:
Which computer systems does Chromoflex software run on?
The Software for Chromoflex II, Chromoflex III RC and Chromoflex III RC mini runs on Windows XP, Windows Vista and Windows 7 (Chromoflex III RC and Chromoflex III RC mini in connection with USB-Dongle).
The use on Linux systems is currently being tested.
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LED general knowledge
Question:
Why LED?
The LED lighting is the light of the future. There are various possible applications of the LEDs: whether in cabinetry, as decorative interior, in architecture, in advertising technology or at the point of sale - LEDs open a variety of new possibilities for design. Due to the low power consumption and considerably longer maintenance cycles of the LED considerable cost savings can be achieved. The very small and compact design of the LED opens new possibilities to find perfect solutions for inaccessible areas.
Advantages of using LED
- low energy, environmentally friendly
- long life
- low heat development, thereby reducing air conditioning costs
- less maintenance
- no infrared and ultraviolet radiation
- shockproof and vibration resistant
- outstanding properties of color-rendering
- flexible use
- 90% Co2-reduction measure
- no quicksilver
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Question:
Is it possible to dim LEDs?
Actually, every LED can be dimmed. It depends on the ballast and the technical structure. The easiest way to dim LEDs, is by using a PWM (pulse-width modulation) signal.
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Question:
What is a LED?
In LED (Light Emitting Diode) electric current is converted into light through compound semiconductors. LED are low-maintenance, robust and have a very long lifetime. They are extremely small, consume comparatively not much energy and nevertheless produce a high light output. In addition they don't emit IR or UV radiation.
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Question:
How does a LED works?
Like a normal diode, the LED consists of a chip of semiconductors to create a p-n junction. Current flows easily from the p-side (anode) to the n-side (cathode) but not in the reverse direction. Normally it is used with constant current or constant voltage including series resistance.
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Question:
How to produce white LEDs?
There are two primary ways of producing high intensity white light using LEDs. 1) Using individual LEDs that emit three primary colours (red, green, blue) and then mix all the colours to produce white light. 2) Using phosphor material to convert monochromatic light from a blue or UV LED to broad-spectrum white light (similar to florescent light bulbs)
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Question:
History of LED?
1907 Henry Joseph Round discovered the effect of electro luminescence.
1962 the first practical visible spectrum red LED was developed and launched (GaAsP).
1971 more colours of LEDs came out as well as efficiency and performance was improved continuously.
1995 the first white LED was presented and two years later launched - at the beginning only in cold white (>4.500K).
2003 also warm white (>2.800K) and neutral white (>3.300K) were launched.
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Question:
How long is the lifetime of a LED?
The lifetime of a LED depends also on its operating and surrounding temperature. At room temperature LEDs have officially up to 50.000hrs lifetime. Not like incandescent lamps total breakdowns are quite rarely. The light output gets less slowly (degradation) until it reaches 50% it's called lifetime.
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Interesting facts about light
Question:
What does Lux mean?
Lux (lx) is a unit of measurement for its light output. It indicates how much light reaches a specific field.
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Question:
How much light is really converted with the incandescent lamp?
3-7% - When an incandescent lamp is switched on, the tungsten filament is heated by electric current until it glows and emits light (2.500°C). Consequently around 95% is generated heat and only 5% is converted into visible light.
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Question:
What does Lumen mean?
Lumen (lm) is a measure of the perceived power of light. Lumen is defined in relation to the candela by 1lm = 1cd*sr. For example incandescent lamp 25W=230lm, fluorescent lamp 20W=1.250lm
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Question:
What does light output / luminous efficiency mean?
The light output (lm/W) is a ratio of luminous flux emitted from a light source to the electric power consumed by the source and thus describes how well the source provides visible light from a given amount of electricity.
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Question:
What does colour rendering index mean?
The colour rendering index (CRI) is a measure of the ability of a light source to reproduce the colours objects faithfully in comparison with a natural light source.
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Energy saving lamp
Question:
How to dispose engery saving lamps?
Energy saving lamps don't really differ in the application to classical incandescent lamps (apart from the time delay until the full light output) but in the recycling. Energy saving lamps are not allowed in the garbage. Due to it's small about of harmful substances (such as mercury) they have to be recycled correctly. Therefore collection stations are available all over the country where you can hand them in without costs.
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Question:
How efficient are energy saving lamps?
The light output of energy saving lamps is about five times more than with incandescent lamps (3-7%). Therefore the energy saving lamp needs about 1/5 of electricity comparing to an incandescent lamp with the same light output. (Be careful due to the content of mercury it is the rule to recycle energy saving lamps properly)
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Question:
How much energy is saved by energy saving lamps?
Example: The energy saving lamp with 15W, incandescent lamp with 75W will need in 2.000hrs operation time: P(incan)*t - P(save)*t = 75W*2000h - 15W*2000h = 120kWh
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