tag:blogger.com,1999:blog-1647306283330544819.post4080134897133877809..comments2023-04-10T05:51:59.652-07:00Comments on Gemma Lighting LTD: Top 10 reasons for choosing LED High Bay LightingGemma Lighting LTDhttp://www.blogger.com/profile/08360274318877681889noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1647306283330544819.post-37917769384824400592016-11-13T09:19:52.162-08:002016-11-13T09:19:52.162-08:00Thank You Ian, Our new LED High Bay Lights can be ...Thank You Ian, Our new LED High Bay Lights can be found here: http://www.gemmalighting.com/products/led-industrial-lighting/Gemma Lighting LTDhttps://www.blogger.com/profile/08360274318877681889noreply@blogger.comtag:blogger.com,1999:blog-1647306283330544819.post-42358622239940729732013-04-23T11:08:45.983-07:002013-04-23T11:08:45.983-07:00Interesting comments, even more compelling reason ...Interesting comments, even more compelling reason to buy lights from GEMMA LIGHTING.Ian Thomashttps://www.blogger.com/profile/02501898190450206216noreply@blogger.comtag:blogger.com,1999:blog-1647306283330544819.post-75171900568872221042013-04-20T21:19:38.104-07:002013-04-20T21:19:38.104-07:00Hi Everyone, LED/Emitter lighting good stuff, but ...Hi Everyone, LED/Emitter lighting good stuff, but there are issues many do not understand or may be sellers or dealers never advice the buyers. The led lighting is a active load, due to it circuits .i.e. PWM build on board to run these leds ae constant current, cause alot of distortion on power line, meaning the current sine-wavve get distorted heavily. Therefore requires Active Power Factor Correction.Galvanic isolation, these are very important, to maintain power quality. For led power ratinng from 6watts above, many thinks its not a requirement to comply safety and power quality, i.e. Power Factor/current THD Total Harmonics Disturbance etc, fact is must comply to EN 61347-2-13/EN 55015/EN 62384/EN 61547/EN 61000-3-2, these are very important qualification must be complied, many E26 led bulb designs are not isolated from primary to secondary circuit, if there is no isolation in the event any high surge, the led and the circuit will blow off and entire circuit will goes off, this is not a good design. The problems most china products due to cheap cost, they build such manner. I would like to recommend please do purchase good led lightings that covers all the safety/quality/reliability and performance complied products. Recent Lighting Science Group, failure or recall is just been compromise on in safety area of the circuits, problems is china product really not reliable at all.Normally like lumens per watt all these tes done in ideal lab condition, well in real life condition whatever lumen mentioned may not be accurate, reason temperature vs lumens, when the temperature increase the lumen will drop, as you know the heat sources comes into led, due to circuit design error, normally minium heat based on ambient temperature muct be calculated correct at the design phase. LED photons emission is really good,because their lumen per watt is far higher then any conventional or analog lighting, with right circuit design their lifespan far better then any conventional lighting on the planet. Good designed leds lighting will never comes cheap Well if you guys have any questions on led slighting whether its commercial or industrial, please free to email to aenergy@singnet.com.sg<br />Please state your details, greatly appreciated.<br />Digital Lumenhttps://www.blogger.com/profile/09274941505721498490noreply@blogger.com