Setting Up a LED bulb testing lab at home

[thefreeman]

@pc2019

How did @maukka generate his BBL charts (like this one)?

With excel, it’s a plot with CIE1931 XYZ as background.

@pc2019

How did @maukka conduct the tint shift tests? He somehow took measurements every 20 degrees, so he can’t have used the integrating sphere. So how did he conduct this test and control the environment and angles?

I don’t know exactly his setup but personally I just marked angles on an arc and moved the spectrophotometer. I guess Parametrek’s method is better : Beam Profiles V3 released: an alternative to spheres and white wall shots

@pc2019

How did @maukka conduct his 1m lux tests (“Intensity (lux at 1 meter, candela) was measured outside the sphere at 1 meter.”)? Did he just point the i1Pro at the bulb in a dark room?

Likely just that.

@pc2019

For @maukka’s flicker tests, did the photodetector have a direct view of the bulb, or did it have an integrated (indirect) view into the sphere?

No need for integration there.