classic B halogen

[333rocky333]

Anyone tried these.
They are being issued to a chain of pubs and wondered how they perform.
http://www.voltimum.co.uk/news/8446...orld-s-First-Energy-Saving-Halogen-Range.html

 

[breezer]

probably clever marketing

 

[Steve]

False marketing more like. How do they get away with this? Halogen isn't energy saving, it never has been. The thing is, people will buy these thinking they are saving as much energy as if they fitted CFLs. Then theres the easily confusable types who will then go out and buy downlights for their whole house, having seen "energy saving halogen" in the same sentence.

We sell them in our shop. But not seen many buy them.

 

[333rocky333]

They have branded the candles 28W = 40 W
with an output of 345lm
NEW -30% ENERGY and say they have a 2000 hour life

 

[Adam_151]

False marketing more like. How do they get away with this? Halogen isn't energy saving, it never has been.

TH lamps do indeed have a greater luminous efficacy than conventional lamps

 

[daytona]

luminous efficacy ,i wont be able to say that later

 

[RF Lighting]

Bradford Theatres have just relamped all their house lights in one of their venues with these type lamps.

It was funded by some energy saving body, so maybe there is some merit to them?

 

[plugwash]

If you have decided to go with incandescent lighting (which is less efficiant than other types of lighting but has other advantages like easy dimming, a wide smooth spectrum of light output, and no special precautions required to keep flicker down) then the hotter the bulb is (up to about 6.5K where it peaks) the more efficiant it is. The trouble is the hotter a bulb is the less time the filiment lasts.

For a given acceptable lifespan halogen bulbs can run at higher temperatures than ordinary incandescents because the halogen cycle redeposits tungsten on the hottest parts of the filament keeping the filament.

Unfortunately downlights give a very narrow spread of light meaning you end up with far more of them than the light level requirements for a normal room would demand. Halogen floodlights are generally far more powerfull than the types of outside lights domestic premisis had before which may be good for security but not for the leccy bill or the sanity of neighbours.

P.S. incandescent lighting (both conventional and halogen) reduces in efficiancy considerablly if dimmed so try to group switch rather than dim where practical.