China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

At a temperature of 25 degrees Celsius and 35 degrees Celsius, the differences in performance of T5 and T8 fluorescnet lamp is 10% lumen output ratio, so the difference between the optimum operating temperature of T5 and T8 light source will influence in different lights in their performance capabilities. In closed lamp in the high temperature, the efficiency of T5 light source may be higher than T8 light source; in the open lamp, T8 light source efficiency will than T5 light source high since T5 and T5 high luminous flux (T5 HO) in the market in 1995, they became the darling of the straight tube type fluorescent lamp family. They inspire the designers, manufacturers and researchers of the dream of sparks. They are gradually becoming the dominant market leader, which has been converted into compact fluorescent tubes. In spite of this, we still consider whether we should replace the T5 lamps with T8 lamps, even though there are many disputes about whether they are better than other fluorescent light sources. In this article, we will deal with the issue of whether the T5 system is more effective than the T8 system, and there is no obvious evidence to prove T5,
There is a clear difference between HO and T8 systems. In order to resolve the problem completely, we need to consider the following factors:
The value of HO is significantly higher than that of T8 light source, which is because the manufacturer is in the best environment temperature for the light source for testing. T8, the optimal operating temperature at 25 degrees Celsius, the T5, the optimal operating temperature at 35 degrees Celsius as you can see, in temperature is 25 degrees Celsius and 35 degrees Celsius, the differences in performance of T5 and T8 is 10% lumen output ratio, so the difference between the optimum operating temperature of T5 and T8 light source will affect the lamps and lanterns are different in their ability to perform. In closed lamp in the high temperature, the efficiency of T5 light source may be higher than T8 light source; in the open lamp, T8 light source efficiency will be higher than T5 light source but, you may ask such a question: what is the true temperature of the lamp? Research institutions used the T5 HO and T8 light source for the measurement of the lamp temperature. In open luminaires and semi indirect lighting chandelier in the temperature range for 29 degrees Celsius to 36 Celsius degree, and for closed luminaires and direct embedded lamps and lanterns in the temperature range for 38 degrees Celsius and 46 degrees Celsius degree. Now that we compare the temperature in the picture, we see that the T5 light source will be much less than the best operating temperature (35 degrees C). In the closed type lamp temperature 35 degrees Celsius higher than, T5 light source than T8 to T5 and other fluorescent lamps are among the best operating temperature difference of 10 degrees Celsius, it caused another problem is luminaire efficiency. The temperature of the test of the light in the light of the standard of foreign lighting is 25 degrees Celsius. When the naked light at ambient temperature is 25 degrees Celsius to run, and in under the same conditions of lamps and lanterns in the ambient temperature may have to be above 25 degrees Celsius, higher inside the lamp temperature T5 light source more light. This process will enable us to measure the lamps and lanterns efficiency higher than 100%.
T5 semi indirect hanging lamps and lanterns in office lighting and T5 direct lighting lamps used in high altitude lighting, and many other examples show us the advantages of T5 system. Despite many practical use, the design of T5 lamps still have room for improvement. For example, in T5 indirect lighting lamp using "Optical Valley" to help us achieve the impression of a bright space; direct T5 lighting in the use of high altitude space can get moderate lamp brightness so as to avoid glare in grass cylinder under the special condition, compared to t5ho with T8, also has space advantage ~ due to the self shielding effects "of the essence of the differences between reflector opening size and tube diameter ratio caused by. So, if you want to maintain the same level of self shielding effect, the more thick, which means that the wider the width of the reflective plate. With relatively simple trapezoidal reflectors, for example, opening width should be three times the tube diameter, the T8 lamp tube diameter is 2.5 cm, the opening width need 7.5 cm, t5ho, need only 4.8 cm if it is a 45 cm wide cylinder, then you can calculate, most can only put six T8 lamp tube, and actually before and after close to the wall of the tube due to light leakage, in fact, only the equivalent of less than 5 tubes of light can be used to. Under the same circumstances, it can be placed at least 8 T5HO tube. Actually, we only need to place 4 branch t5ho lamp, in only occupies the cylinder space half of the cases, the luminous flux and utilization of the total than filled with 6 T8 is higher and T5/T5HE, due to the "luminous density" (can actually understand equivalent luminance) and T8 is basically the same, so the requirements of high light illumination intensity and its advantages, and can not be truly reflected. The reason why T5/HE in civilian lighting occasions compared to T8 has obvious advantages, in fact, is not the so-called "," caused by, but in most cases the visual feel for environmental illumination is 300 or 400LUX is not very sensitive. Also is in most lighting situations, the T8 lamp illumination is really beyond the actual needs of, such as small rooms, corridors, halls, teahouses, cafes, etc., the higher efficiency did not too much significance, but requires less power alternatives.

So in the application of grass cylinder, T5 and T8 virtually no much difference, T5 ho although light effect is slightly worse, but the space advantage but can greatly improve the light utilization rate, reduces the light leakage and self shielding effect. T5 h0 seems to reduce the self shielding effect, but due to the single lamp luminous flux is less. Therefore, compared with the T8 more plus 1 to 2 branch tube, the reflective plate opening width and T8 quite. Therefore, light utilization rate is not higher than T8.