Have a bath in the low-voltage system and for years I use there 35 Watt halogen spotlights from Philips. Today I installed these Osram LED, advertised with "equivalent 35 watt". If so hot: replace your old 35W halogen and Osram will shine just as bright for you. Said and done ... and of course they are darker. The whole bathroom is dark illuminated than before. The orientation of the radiator has not changed course after the change. That it is darker, has only once subjectively you can tell me. Is it ... for now. So I went today to a store and bought a light meter to measure the power of Volt illuminance indoors.
Test environment:
lightless Bad 0 Lux with only a mounted spot directed downwards. Including a wooden stool placed. On the stool, the light meter is just below the radiator at a distance of 1.80 m (measured with laser rangefinders from Bosch) is aligned with the laser beam.
At first I test the conventional 35 Watt halogen spotlights from Philips. Beam angle 36 ° -> Light on -> Result: 650 lx
now the 2nd test:
Osram LED Star 7W (like 35W). Same distance to the light meter, the same beam angle 36 ° -> Light on -> Result: 330 lx
3rd test. This time, a reference point on the wall, which illuminance expect here?
Halogen = 60 lx
Osram = 42 lx
Whether illuminance on the stool or on the wall. Osram generates less light than a 35 Watt halogen spotlight. The luxmeter has confirmed the visual impression. Less light. I called Osram at times. Lady on the phone: memorandum: "Yes that's quite possible ... the LEDs are not yet sufficiently developed ... since they have to wait few more years if they really have a 1: 1 replacement Search ... You can indeed be write to the sales department ... "
No I did not for me. Another phone with a large LED online merchants. We will likeable and he says something out of school. Gedächnisprotokoll: "Of course, the details are pushed up because it sells better." Of course I can remeasure the values here in the lab, but I can not specify modified ... I have to keep to the manufacturer otherwise threaten me warnings. .., ... and of course, let's face it ... who would buy the Osram lamps or other if there instead of 35W only 20W is 50W or instead only real 30W ... no ... "
I soon here and see.
What tells me? Waiting has arrived to the EU standard, and has established itself in all lamp products. Yet anyone can write up because what he wants.
My conclusion until further notice. Halogen on, LED off.
