240 volt or 12 volt Halogen Downlights

General Technical Stuff, Halogen 20 Comments »

Dear Daniel,

Downlights with or without transformers. Which one is safer? Which one is less expensive to run?

Would appreciate your thoughts

Kind regards

Arun

how do I change a halogen bulb

Halogen 1 Comment »

Hi there,

It is the first time I have come across a 78mm linear halogen tube.

I am basically not sure what is the correct way of installing and removing them from the fitting. I had to replace one and I had troubles just removing it. I ended up literally destroying one side in order to get it out. I bought a replacement (and just realised that I could’ve got it much cheaper on your site – will know for next time now) and I just cannot put it back.

The fitting’s sides are slightly retractable but I still can’t put the tube in.I am afraid forcing it too much not to break it. Can you please let me know what is the correct way of installing and removing these tubes.

Any advice would be very welcome.

Until I hear from you, we’ll just be in the dark.

Regards Damir

Why does a light globe blow?

General Technical Stuff No Comments »

Many people write to me complaining how they bought a bulb from Woolworths or Coles and they fitted it up and that the new globe failed in a very short space of time!

Well there could be a few reasons why this has occurred.

The first could be the quality of the globe. light bulbs are no longer manufactured in Australia and are therefore all imported into the country. You will see globes from all over the world – Indonesia, China, Germany, Spain, USA or Italy. As with many things in life you get what you pay for. Unless you get enjoyment from climbing ladders, always look at where the product is manufactured. The filaments in quality globes will outlast the cheap ones most of the time.

The second reason could be the rated voltage of the globe. Sometimes you will see a long life version of a light globe right next to the cheaper one. Next time have a look at the voltage on the side of the long life version and you will notice that it is higher than the cheaper alternative. This is why the lamp lasts longer as it is continually being operated under voltage. You can achieve the same result by using a dimmer switch.

Another reason could be that the electricity company may not be providing you with a constant voltage. In many areas in Australia, especially during peak times there will be times when the mains voltage exceeds the standards. We know that under voltage increases lamp life, the opposite occurs when the lamps operate on higher voltages.

And sometimes lamps just fail. You must consider that millions of light bulbs are imported into Australia every year and occasionally a rogue globe sneaks through quality assurance and just blows.

Hopefully next time you are left in darkness at the most inconvenient of times, you will understand a bit of the science of why the light globes might of failed.

Long life incandescent globes are available in all sorts of shapes and sizes online from Lighting Pro Australia.

Dangerous Heat Caused by Halogen Downlights

Halogen 1 Comment »

Hi Daniel,

I have halogen downlights downstairs in my 2 storey home. I can feel “hotspots” in my timber floor upstairs directly above the halogen down light and am concerned about a fire hazard.

It would be hard to put in one of your heat guards without cutting large holes in my ceiling. There is about 15 cm between the ceiling and the floor above.

Would I be better off with a low voltage aluminium reflector bulb.

What can you recommend?

Great site BTW.

Cheers.

Neil