LED's light data?

[WL500GP]

Hi all,

 

i have now in the small arch-viz project i'm at been asked to insert LED's, but arent able to find light data for the specific bulbs(LED's), i think this is the one choosed: OSRAM LED Parathom Classic Globe W-white E 27(cant post links yet...)

 

 

have downloaded the OSRAM light data, the above bulb isn't included in the database, now is there any other way to aproximate LED's?, it's a single "pointlight" in terms of 3D space, but what's with the power/light ratio, much better than a std bulb that much i understand, the one above is rated at 3W and is said according to the "Product Benefits" by OSRAM to raplace a 15W std bulb,

 

so does anyone know where to get light data(IES) that matches the above LED bulb(or close to it)?

 

i'm working both in 3dsmax 2009 and in DIALux,

 

 

Cheers,

 

k.

[danb4026]

See if any the attached LED ies files works for you. I attached as a zip file, hope that works.

[SandmanNinja]

saved to my IES lighting folder. Thanks

[WL500GP]

thanks Daniel,

 

but what are those .IES files for? I checked them in 3dsmax, seems they are corresponding to manufactured fittings by Edison Price, from what I could see from the .IES file they are fittings with reflector etc and at a much higher power(around 25w) then the ones i'm going for, i checked at Edison Price but could not find any LED "Bulbs", if they do have them, anyone got a link to them & or specs?

 

Cheers,

 

k.

[danb4026]

They are the LED's I could find. I just adjust the power or multiplier to get the illumination I want. Seems to work for the client.

[Crazy Homeless Guy]

much higher power(around 25w) then the ones i'm going for

 

More than likely you are going to need to trust your eyes, and interpret how the final results will look. Just popping in a 25w or whatever and getting results that look like the will in the real world is rare.

[WL500GP]

Thanks Daniel & Travis

 

I do appreciate the LED data files, i'm trying to take a as "scientific" route as i can this time. Right, i do know that renders are done via a camera in 3dsmax, and as such they can be over/underexposed etc, and one really want to have a final render similar to that of what a human eye can see in terms of contrast etc, that human eye perception has to be faked with real world cams(multiple exposures combined to a HDRI)

 

but i guess that in a few realeses of max the renders would be something that resembles the real world light scenario, i guess that whats the light tool in 3dsmax is aiming at(i'm not on the design version, so i havent tried that tool, yet)?

 

have tried to light up a room with just a vague idea on how much it'll take to lit it proper, did so in max(a grid of halogen spots, 3*5 in a room 9*4meters) with data files and got a fairly good light in the renders, however i did a test with the very same configuration(same spotlight grid) in DIALux.

From DIALux i got the Lux(in north america foot/candles(?)) value, max Lux was 150 or so right under the spots, 150 is a bit to low to be considered "good" lighting, 500Lux at workplane(office desk for ex) is good work light i've been told, about 300lux at hallways etc is good enough also,

 

so by the above ex i'd been using roughly half as many as required,

 

also i've asked around about the new light analysis tool in 3dsmax, especially interested in mixed light scenarios, incoming sun/sky light mixed with photometric lights, can this be done in max? have tried myself, but have to crank the "bulbs" to levels that are unrealistic

 

 

Cheers,

 

k.