Are "daylight therapy" lights daylight balanced?

[sheeep]

I found a "therapeutic full spectrum" light around the house, and when I tested it against a daylight balance it seemed to work very well. I found a mailorder place that has lamps for a fraction of the medical suppliers, and I'm wondering if I could piece together a daylight balanced DIY kit for cheap.

I'm talking about something like this:

http://www.lighttherapyproducts.com/sunlightjr.aspx

The bulb itself says 5000k, so I guess it's a bit cooler than actual daylight balanced 5500's.

Just wondering if anyone has any experience with these.

thanks

 

[Spartacus]

I found a "therapeutic full spectrum" light around the house, and when I tested it against a daylight balance it seemed to work very well. I found a mailorder place that has lamps for a fraction of the medical suppliers, and I'm wondering if I could piece together a daylight balanced DIY kit for cheap.

I'm talking about something like this:

http://www.lighttherapyproducts.com/sunlightjr.aspx

The bulb itself says 5000k, so I guess it's a bit cooler than actual daylight balanced 5500's.

Just wondering if anyone has any experience with these.

thanks

5000K would be WARMER than daylight at 5600K...

The colortemp isn´t the important factor, but rather the spectral balance.
Those therapy lamps often offer a graph showing the emited wavelength of light, you will want to look out for green spikes.
But since they try to mimic daylight and not aim for the highest output, those lights are pretty good generally...

 

[Jason Miller]

thats pretty cool but the falloff seems a bit much, how does this

• 10,000 lux at 14" from the unit
• 5,000 lux at 21" from the unit
• 2,500 lux at 31" from the unit

compare to Kino or coollights?

 

[PerroneFord]

thats pretty cool but the falloff seems a bit much, how does this

• 10,000 lux at 14" from the unit
• 5,000 lux at 21" from the unit
• 2,500 lux at 31" from the unit

compare to Kino or coollights?

Kino's are amazing, but they still adhere to the laws of physics. Light falloff is still constant factor no matter the source.

 

[Jason Miller]

Different lights, using different reflectors, and Chimicals in the lights will have more or less lums and different fall off,

 

[syncman]

Different lights, using different reflectors, and Chimicals in the lights will have more or less lums and different fall off,

The fall off is a Constant, it follows the Inverse Square Law. Twice the distance, One Quarter the amount of light.

 

[Spartacus]

BTW, why bother with these lights?
They are 179$ for a 55W unit.
The CoolLights http://www.coollights.biz/cl255pmd-cool-lights-portable-dimming-watt-softlight-p-69.html is a professional light, actually made for on-set use and the 2 x 55W unit sells for 369$...