Call us a bit geeky, but we are always interested in the performance and light properties of the different types of LED lightbulbs that are now widely available.
We often read a book or flick through some magazines during our lunch break on the couch in the office area, so in looking to upgrade the three existing low voltage halogen globes, we thought we'd test the task lighting performance of:
- cheaper lower wattage 3.3 Watt LED globe - 230 lumen output - cost $3.75
- existing 60 Watt Halogen globe, which typically uses 68 Watts when transformer resistance is included - lumen output unknown - $3.00 - cost around $5.00 dependent on quality
- 5.5 Watt Phillips LED globe - 400 lumen output - cost $12.50 each
Understanding the quality of light produced by different globes (light 'rendition') is always important in lighting design and the images below show that while the 3.3 watt globe struggles to provide effective task lighting, the 5.5 Watt globe provided a good alternative to the existing common halogen downlight globe.
Appreciating how the same lighting performance can be delivered by an LED globe using 5.5 Watts per hour, as opposed to the halogen using 68 Watts per hour lets you understand the revolution that innovation in globe production has delivered in recent years.
The LED gives the same usable light output, but using only 8% of the energy - now that's the sort of performance we need to achieve by utilising smarter technology in other elements of our buildings.
The area where we did the testing and the three globes being tested for their lighting quality
5.5 Watt LED - Phillips
68 Watt Halogen
3.3 Watt LED