Why not just use filters to achieve the 'tint' you want?

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Why not just use filters to achieve the 'tint' you want?

I’m new, so this is probably a very silly question – but after reading all about the special ‘magenta’ tints that some Nichia emitters are capable of, and how highly sought after they are because of it, this got me thinking – why not just add a magenta filter over the lens of the emitter if you want that effect? With filters, surely you can cheaply and easily modify whatever flashlight to have whatever tint you want without searching for rare and expensive emitters?

There must be some sort of disadvantages to doing that? But what are they?


SammysHP's picture
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Joined: 06/25/2019 - 14:35
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Location: Germany

The major disadvantage is efficiency. Some big amount of light is lost with the filter. Also the spectrum is very specific for each LED and a filter will behave differently depending on the LED. If you want high CRI with nice tint and good efficiency you have to use the proper LED for this task.

thefreeman's picture
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Location: France

Filters decrease the output, while a more ”rosy” LED also has lower output than a greenish LED the difference is not as big.
They age : https://budgetlightforum.com/node/75045
And they can be finicky to instal especially when the lens can’t be removed.

raccoon city
raccoon city's picture
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Location: Palm Desert CA ~ West Coast is the best coast

I hope you have fun here, cactus_farmer!

I live in the desert, and we have our own "cactus garden" where we grow plants that are dangerous for our dog like cacti and Euphorbia.

BLF member Boaz has a bunch of filters to choose from, and he sells them in small quantities and on the cheap.

Last seen: 4 hours 36 min ago
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Location: Boise

Working in the live entertainment business for years, I have used the Roscolux #2 “bastard amber” gel and many, many others on LED lights. Is it effective? Yes. Is it really accurate? probably not.

wle's picture
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led ‘white’ is made by blue [the led natural color] plus yellow [from a phosphor-which the blue excites to make the yellow]

the only way to make a too-blue light warmer is to filter out the blue- turn it to heat – which is inefficient

it;s better to have the LED itself make more yellow[with the phosphor], than to just waste the blue

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