Question

Write a statement of your design ideas in less than one page long (e.g., why you need

those new luminaires, for what lighting purposes, which lighting effect you want to achieve, and how, etc.). Use some photometric data (e.g., lux, cd/m , CRI, etc.) to support your ideas. Calculation is optional. The photometric data can be obtained from the cut- sheets of the luminaires

could you please give at least examples of ideas and what photometric data can I use with them? thanks

Answer 1

There are two photometric units that we need to consider here, total luminous flux and luminous intensity. Total luminous flux is the total amount of light emitted from a light source, corrected for the spectral response of the human eye to light. It is measured in lumens. The luminous intensity defines the amount of lumens in a given direction, per solid angle. This is measured in lumens per steradian.

There are three formats: IES; EULUMDAT; and TM-14.

The luminous intensity data needed for photometric files is generated by a goniophotometer. A goniophotometer is a mechanical device to support and optionally position the light source (a luminaire or lamp) and a photosensor which measures luminous intensity at each angle, at a set distance. The goniophotometer set-up can be as simple as a manual engineering turntable and a light meter.

This was some brief intro for photometery.

This is some photometric data which you can get for any on internet I have ot this one from there itself.

Now luminairies is light fixtures so one need to fix the light as such within minimum area occupied and less electricity consumed you will get more intense light (e.g. now we are using LEDs if you see LEDs also at first the intensity was dimmed one but now the intensity has increased appreciablely this is due to desing and power and king of leds used). So according to what you have to illuminate wether its a room or office or say some party room the light source will change accordingly and even design. For achieving this photometric data is important as it will give the flux intensity of light.

I will give an example of shows where they use focused light, LASER light (you can get the data for it quite easily) design is also quite good to grab knowledge about how the lamps are designed.

Blue LED has discovered back but least used so you can also give an idea to use blue LED for your ans.

If any query or you need any clarification please comment the same I will be sure to give the needful.

Thankyou!