Blue Lee Filter suitable for LED Floodlights

[maxie0511]

Hi all

 

I'll begin with a little background to my situation. A client wants to colour the LED floodlights which illuminate the school mansion buildings at night. We have previously done this in green for mitochondria awareness (or something...) week a while ago.

We are now trying to do the same in 'NHS' coloured blue as a sign of support for the NHS in this difficult period.

When we did it with green, we just used Primary Green (LEE 139) filter held in some boxes which sat over the top of the floodlights.

 

My question is, we have tried some existing blue filter we had in the theatre but the power of the floodlights is just washing the colour out. (I don't know what LEE filter it was but looks like 'Daylight Blue 165 or even lighter)

Does anyone recommend a particular LEE filter which would be suitable for this. Also should I look at some colour correction filter as well to 'warm up' the cool white LED floods?

The LED floods are around 200w, set pointing up at the building (built from Bath Stone). The floodlights are between 5 and 20m from the building.

 

 

Kind Regards

 

Max

[Bryson]

119 is about the blue "equivalent" of the 139 you used for green. It's about half the transmission value, though. 197 is closer to 10% transmission but may not be deep blue enough.

 

Not sure how long it will last. Gel on LED fixtures ages weirdly. They do make a range that is designed for LEDs but don't have a deep blue available in that.

[themadhippy]

As above normally 119 for a decent blue blue,if thats too dark my next goto would be 079 Edited April 14, 2020 by themadhippy

[maxie0511]

119 is about the blue "equivalent" of the 139 you used for green. It's about half the transmission value, though. 197 is closer to 10% transmission but may not be deep blue enough.

 

Not sure how long it will last. Gel on LED fixtures ages weirdly. They do make a range that is designed for LEDs but don't have a deep blue available in that.

 

Thanks for your swift reply Bryson!

 

Looking on the LEE website, I think 197 may not be quite blue enough unfortunately.

Where do I get technical data about the filters such as the transmission value? As that may help narrow down the potential options so as not to loose too much light.

 

The filter will only be used for a few weeks to a month so its not too much of an issue if the gel ages quicker than would do usually.

 

 

Thanks Max

 

As above normally 119 for a decent blue blue,if thats too dark my next goto would be 079

 

Cool, thanks for the guidance. So you would recommend 119 as being a good potential bet?

 

Thanks Max

[alistermorton]

I lit my own house with L132 on PAR cans for one NHS evening. It's got a bit of a slight green cast to it, though. A good blue with reasonable transmission is L716

 

The Lee website has all the photometric data - transmission and spectrum.

Edited April 14, 2020 by alistermorton

[MrBoomal]

L195 would be my choice. A lovely blue with good transmission.

[Don Allen]

The Lee filters book The Art Of Light is worth downloading as a useful reference. In the colour range section it has Transmission data and the effect/colour is useful.

[bigclive]

The resultant colour will depend strongly on the spectral peaks emitted by the LEDs. It may be worth masking a light off with cardboard with a slot and trying some swatch gels over it to see the throughput and resultant colour.

[alistermorton]

We have some of the cheap 10W cool white LED floodlights in the wings gelled with 119 (or maybe even 120 - there's not much red emitted by the floods anyway) - they work really well as worker blues.

[sunray]

We have some of the cheap 10W cool white LED floodlights in the wings gelled with 119 (or maybe even 120 - there's not much red emitted by the floods anyway) - they work really well as worker blues.

I cheat and use cheap RGB 10W floods. Usually not quite full level blue for wings and red for the corridor that opens onto wing.

 

The bigger benefit is when an elderly player says they cant see I have some instant adjustment I can play with.

 

[maxie0511]

Hi all

 

Thanks for all your help and advice, just about managed to get it all finished for Thursday night.

If anyone reading this in the future is a similar situation.... ! Eventually settled for Medium Blue (132) after a trial between that and Just Blue (079), medium blue offered the best transmission levels for the building.

End result looked very good (see photo links).

 

https://ibb.co/6rhJKLJ

https://ibb.co/MDKJsf4

 

Now onto the next buildings!

 

Thanks again

 

119 is about the blue "equivalent" of the 139 you used for green. It's about half the transmission value, though. 197 is closer to 10% transmission but may not be deep blue enough.

 

Not sure how long it will last. Gel on LED fixtures ages weirdly. They do make a range that is designed for LEDs but don't have a deep blue available in that.

 

 

As above normally 119 for a decent blue blue,if thats too dark my next goto would be 079

 

 

I lit my own house with L132 on PAR cans for one NHS evening. It's got a bit of a slight green cast to it, though. A good blue with reasonable transmission is L716

 

The Lee website has all the photometric data - transmission and spectrum.

 

 

L195 would be my choice. A lovely blue with good transmission.

 

 

The Lee filters book The Art Of Light is worth downloading as a useful reference. In the colour range section it has Transmission data and the effect/colour is useful.

 

 

The resultant colour will depend strongly on the spectral peaks emitted by the LEDs. It may be worth masking a light off with cardboard with a slot and trying some swatch gels over it to see the throughput and resultant colour.

 

 

We have some of the cheap 10W cool white LED floodlights in the wings gelled with 119 (or maybe even 120 - there's not much red emitted by the floods anyway) - they work really well as worker blues.

 

 

We have some of the cheap 10W cool white LED floodlights in the wings gelled with 119 (or maybe even 120 - there's not much red emitted by the floods anyway) - they work really well as worker blues.

I cheat and use cheap RGB 10W floods. Usually not quite full level blue for wings and red for the corridor that opens onto wing.

 

The bigger benefit is when an elderly player says they cant see I have some instant adjustment I can play with.