Light Pollution UpdatePosted By Rod Kaufman |
All,
Thanks for your kind comments.
Additionally, and although I did not have direct involvement in the following project, the county of Los Angeles is also initiating a program to do a mass conversion of existing street lights in the unincorporated areas of the county, such as in the target area and similar regions, to IDA certified LED units that are dark sky friendly and will reduce light pollution. I've been in contact with the project manager and he sent me the links to prove it. These are 2700k rated units, as opposed to the 4000K blazers used in various cities, and my initial read on their spectral flux graphs indicates to me that 85-90% of their emissions can be evaded by commonly available visual UHC and 0111 filters. I hope to post images of the transmission graphs with filter curves transposed over them in about a month or so.
Thanks for your kind comments.
Additionally, and although I did not have direct involvement in the following project, the county of Los Angeles is also initiating a program to do a mass conversion of existing street lights in the unincorporated areas of the county, such as in the target area and similar regions, to IDA certified LED units that are dark sky friendly and will reduce light pollution. I've been in contact with the project manager and he sent me the links to prove it. These are 2700k rated units, as opposed to the 4000K blazers used in various cities, and my initial read on their spectral flux graphs indicates to me that 85-90% of their emissions can be evaded by commonly available visual UHC and 0111 filters. I hope to post images of the transmission graphs with filter curves transposed over them in about a month or so.
