Are light pollution filters still needed?

[bendiddley]

Now that most street lights are LED, I'm wondering if light pollution filters are still needed as I was under the assumption that they only filter out the old orange sodium lights?

[RT65CB-SWL]

Unfortunately they [ie 'traditional' LPR filters] don't work is the simple answer. LED streetlighting gives off too much at the 'blue end' of the visible spectrum. 

Using a neodymium, UHC or Olll filter should improve your viewing. The Olll maybe overkill on small aperture ‘scopes.

Edited November 4, 2022 by Philip R

[bendiddley]

Many thanks!

[City9Town0]

Are light pollution filters still needed?

Lights just added to the garden behind me... my one piece of 'reasonable' Bortle 4 sky is gone.

[Ian McCallum]

22 minutes ago, City9Town0 said:

Are light pollution filters still needed?

Lights just added to the garden behind me... my one piece of 'reasonable' Bortle 4 sky is gone.

That's disgusting!😠

[bomberbaz]

38 minutes ago, City9Town0 said:

Are light pollution filters still needed?

Lights just added to the garden behind me... my one piece of 'reasonable' Bortle 4 sky is gone.

Put up some kind of screen to keep it out of your garden, only answer really.

[Trippelforge]

On 14/02/2023 at 14:49, bomberbaz said:

Put up some kind of screen to keep it out of your garden, only answer really.

 

My neighbors started leaving their porch lights on so I did this... 

 

[Merlin]

Maybe you could explain the light pollution problem to them and ask them politely to shade the lights.

Offering them an observing evening in your back yard might get a  sympathic response.

[Karl Perera]

Yes we need mass education because most people are blissfully unaware of this problem...

[PeterCPC]

On 04/11/2022 at 08:55, bendiddley said:

Now that most street lights are LED, I'm wondering if light pollution filters are still needed as I was under the assumption that they only filter out the old orange sodium lights?

IDAS D2 filters are useful for LED lights.

[bendiddley]

20 hours ago, PeterCPC said:

IDAS D2 filters are useful for LED lights.

Great thanks