Technology differences and development status of LED light tubes regard to ballasts:

LED tubes of the first generation offered the possibility to be connected directly to the power supply. This always caused an intervention in the holder and a removal / bridging of the ballast. Since the holder was designed for the fluorescent tube operation, N + F was fed either on one side or on both sides (both pins on one side were connected). In this case, there was always the danger of a current transmission in the case of feed-in on both sides. In the case of single-sided feed, operation in existing holders was not possible.

Since the supervisory authorities understandably rebuilt the mounting and the risk of electric shock, double-sided LED tubes without safety precautions are not permitted or must be installed in such a way that a risk to the user can be excluded (completely sealed bathtubs). The conversion effort was very cost intensive. However, such products are often sold at extremely competitive prices from the Far East.

Joachim Schmelter has since 2008 developed the Jumpertechnology (LED-tubes 2nd generation). This principle became national as well as international EP-Patentschrift patented. It was the birth of the first LED tube, which made possible a so-called retrofit conversion in brackets with all magnetic ballasts by the change of the starter against a bridge starter and the change of the tube. The first plaggiate would fast be recognized, because they ran only with 50Hz magnetic ballasts. The plagi producers, mostly from the Far East, quickly picked up any idea. But a change to LED without re wirering by the use of jumper technology is only possible if a megnetic ballst is pre-installed (a starter is available, which can be changed). Due to legal disputes with market leaders (large corporations), we had to close the patent in mid-2015. However, since the jumper technology can only be used with fluorescent tube holders with conventional ballasts(CCG) and low-loss ballasts (VVG) (there most be a starter in the fixture), we have worked long ago on a secure, universal LED light tube.

As of 08.07.2011, we were able to publish a utility model for the first universally applicable LED light tube Patentschrift zur SI2+3-Technologie. The control principle inside the tube made it possible for the first time that an LED light tube can be used in brackets with CCG, VVG, ECG or direct current.
Even dual circuits (one ballast operated by two fluorescent tubes) could be processed with this core technology. However, this product is only approved for industrial use and there are still some rarely installed ballasts that are not 100% compatible. Furthermore, the basic technique had the problem that the safety requirements for LED tube replacements in existing holders for fluorescent tubes were not complied with in the case of incorrect pre-cabling of the breaker (N + F) and at the same time incorrect handling of the tube (one-side screwing in and simultaneous touching of the open contacts) could become. A mixing operation with fluorescent tubes was not recommended. However, since it is quite reasonable for an industrial user to read the safety instructions, we have released the product only for industrial applications with appropriate safety instructions.

However our claim was higher. We wanted to develop the first LED light tube compatible with all ballasts, which can be easily used in handling, such as a fluorescent tube.

As a result, we have developed the SI®4 technology, the first LED tube, which is 100% compatible with all ballasts (currently known). Patenschrift zur SI®4-Technologie. At the same time, a specially developed, eu-wide patented switch is required at both ends Eintragungsurkunde EU that a current breakdown, even in the case of incorrect application, is not possible. The switch has a dielectric strength of more than 3000V. All control units are stored in a plastic tube for additional safety. The light output of a 1.5 m unit is currently> 3000 lm (stand 4/2015), which means a saving of more than 50% (old 58W new 27W) with a 1: 1 exchange. The ideal solution for all grown companies who do not know exactly which ballasts are installed in their lamps and are looking for "one for all". The SI®4 technology is ENEC, VDE and TÜV compliant according to the current state of the art.

Cost optimized by the use of the old lamps (brackets), without conversion effort, easy to handle. Fluorescent tube out, LED-SI4 tube pure. Mind. 50% savings, and this in the coming years. Guaranteed.