Hope this helps Wokka?
OUT GUys!!! Sharkies LOST!
No..... you clearly don't understand about realistic facts and how that applies to everyday applications in specific lighting applications....
Don't insult your own intelligence mate, do your research first, as these are facts and proven as such!!!
Good comeback LMAO
Yes 12 v has more heat....and is not necessarily more inefficient, as electronic transfomers have addressed that inefficiency in comparison to the old "wire wound" trannies. at the end of the day, there is not much difference unless you are running a heap of enclosures....more specifically and to give you a more educated response, probably better than some, what are you actually asking ie setup plans etc...
Sorry CR NO Way, what evidence do you base that statement on??? LOL Do the experiment yourself....Get a 50w 12v dichroic and a 240v 50w incandescent globe in their respective fittings and compare the heat output on a given surface with all parameters the same.
Dichroics produce more heat because of the way the actual globe is manufactured. Usually they are enclosed as a sealed beam unit due to the legislation on UV exposure (and possible litigation that most are petrified of) as UV does NOT penetrate glass, ALL come with with a reflective coating on the "skirt" of the globe, to direct the light and "subsequent heat" downwards. If they didn't the light efficiency would be lost as light travels in all directions correct. If the light is not directed efficiently why purchase it. Dichroics come in many beam angles ranging from 15 degree spots to 180 flood lights! In comparison to a incandescent ( normal light globe) Alot of light is lost upwards, is that the way you would want the light to be directed for a specific purpose... Ummmm NO?
Dichroic "light fittings" are designed to dissipate the heat upwards away from the people underneath, these globes compared to Incandescent globes, produce much more heat that may not be something that the end user "the client" desire.... imagine sitting in a hair dressing salon, with awesome dichroic lighting that is focused on your seat and the hairdresser thats doing your hair. IF the fitting is enclosed and because these lamps produce soo much heat, not only will it make the client cook underneath, but also it would make the globe "blow" constantly because heat travels upwards and their is no where for the heat to escape. Thats why downights "usually" are open topped to dissipate the heat upwards as that is the way heat travels...upwards!!
So why have they recently designed a "low heat" dichroic then????
I have had many a meeting with lighting distributors and manufactures mainly from OS as we in Australia cant compete with manufacturing costs here, as the demand for a low heat Or heat directional dichroic globe is needed...why, because the MAIN Concern from a 12v dichroic globe in a "directional" fitting(downlight or spotlight), is a major contributor to fires....WHY because the heat travels upwards into the ceiling space with little or no ventilation and possibly covered by insulation or poor ventilation. Not being condescending but, the facts are, low voltage lighting is more aesthetically appealing and can be purposely used so much more effectively than incandescent, but they do produce more heat!!
Back to the thread, I cant conclusively say that a 15w 240v globe is more cost effective as this is a different topic as opposed to a 15 w 240w globe producing more heat. Conclusively a 12v 15w globe WILL produce more heat, but I do agree with CR that there are efficiencies lost because of the Transformers used in low voltage lights...but now there are electronics transformers which blow your theory out of the water CR! BUT I couldn't be arssed to debate that now. ALL I can say is the electronic TX's are way more efficient than the OLD "wire wound" models which I think you referred too in your post...
No..... you clearly don't understand about realistic facts and how that applies to everyday applications in specific lighting applications....
I argue with opinionated and self obsessed egotistical people ever day! AND I hate to sound opinionated myself, but hey that's what I do!
It's a shame that (not you, as I don't know you, so please don't respond negatively) most "educated idiots", people with degrees but no real life experience, think that because they learn from a text book it is Correct!
It doesn't happen in real life...even though the science people think it does. CR I hate to divulge this on an open forum as it is against my nature to tell of my "really" personal accomplishments, but I HAVE invented, patent and sold 2 x inventions in the Electrical Trade, I also have 1 x Patent pending, still in the hands of my Patent Attorney. These ideas ALL derived from a problem that needed to be solved in my profession and everyday work place environment. I hate to say that, BUT in my Profession and Job Description, I have to solve these issues everyday, and you think I know nothing about lighting and heat differential and dissipation? What do you know on this topic/subject what's your experience?? LMAO...APS Engineers..What a joke!
I also regret wasting my time posting on a subject that I do know something about and have had a input on lighting design for some major developments in Sydney & interstate with manufactures from overseas, for developers who we have all heard of and want my input....have you done that?? Unbelievable!!!
Its a sad day again...I sometimes wish I didn't have the love of herps, as this is the biggest herp site in Australia which I enjoy and relax being a part of and i do try to post information that most on the site can gain from.
Good luck champ, no wonder alot of the most educated herp people that don't post here anymore are still in contact and laugh at the way things on this site have transpired!!!!
