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[maukka]

@ToyKeeper

BTW, how are you measuring tint and CRI? I’ve wanted to be able to do that for ages…

I’m using an x-rite i1pro spectrophotometer. Tint graph is just x and y coordinates plotted in Excel.

More info about the software can be found from any of my reviews or from one of the other miscellaneous threads:

Nitecore MH20 NW measurements (usb rechargeable 18650)

[image] Introduced last year, the Nitecore MH20 is a usb rechargeable compact 18650 flashlight with a distinctive two stage side switch. The switch has a similar feel to a camera with a small indent for the half way press which is used to change modes or activate moonlight mode from off. Nitecore claims that the MH20 is the smallest and lightest 18650 light with the recharging function. The MH20 is available with a cool white and a neutral white emitter (Cree XM-L2 U2). The light tested here i…

Approximating color temperature with smart phones and camera

Color temperature (cool, neutral, warm, measured in Kelvins) among tint (magenta, green) and color rendering (CRI) seems to be one of the most important factors when choosing a flashlight. Since it is usually difficult to measure the absolute color temperature without professional tools, I decided to test a couple different ways of approximating it with cheap methods. As a reference I used a X-Rite i1Pro spectrophotometer, to which all of the contenders were compared. For meaningful results, I …

CRI vs. alternatives with measurement examples

Hi all, I just bit the bullet and bought a highly regarded BabelColor CT&A analysis software that provides much more information than I’ve been able to provide regarding color rendering. Research has shown that CRI is quite inaccurate in representing the color fidelity with LED lights. CT&A is also able to extract some replacement indices, such as CQS, CRI2012 and MCRI. I gathered here some information on metrics. CRI: Color Rendering Index (1995) The only widely used standard for quantifying…