Review : 1700K LEDGUHON COB Ra>90 test and tint mixing with 4000K Sunlike SOL

[lightdecay]

@cetary

@Robin Dobbie

thefreeman recently tested lee minus green filters and they didn’t even last a day.

Resource?

Lee Zircon minus green filter lasted longer than a day, but there was noticeable degradation too.

Lee minus green and Zircon minus green filters durability test

After putting an eight minus green filter on a H600Fc IV I saw it losing its effect quite rapidly, like after one or two runtimes. This prompted me to switch to Zircon filters as they are supposed to be more durable. Since then I got a spectrophotometer so I decided to test their durability. For this I use an YPL Unicorn 1.0 (LH351D) which has a maximum output around 800lm, and a sustained output around 400lm. It has a PID thermal regulation and the head surface temperature stays constant aro…