Lamp post lamp advice needed.

An example of a lamp being upgraded to LED by bypassing the ballast.

Agreed - not difficult, but if the original ballast is still servicable, surely the customer should be given the choice?

The70 Watt SON lamp may be brighter, have a different light quality, and may take a while to fire up to full light output on initial turn on.

www.stouchlighting.com/.../led-vs-hps-lps-high-and-low-pressure-sodium

Z.

Zoomup said:

The70 Watt SON lamp may be brighter, have a different light quality, and may take a while to fire up to full light output on initial turn on.

Older people may find LED light much more difficult to read and see clearly in, and selection of colour temperature is very important for this reason. Also LED light disperses differently, making shady areas darker. Other people may be sensitive to LEDs operating at certain conversion frequencies used to convert from AC mains to DC, preferring "pure DC" powered LEDs.

Which old people will be reading in the large grounds of this house at night under a Victorian style lamp post?

Z.

I often like to sit out and read on a balmy evening ... but reading is not the only opportunity for which we use our visual faculties at night, and I didn't limit it to reading.

If people find it more difficult to see under LED light, they may also find it difficult to navigate a safe passage to the house.

Having said all that, some people's eyes never got on with certain varieties of [particularly non-corrected] sodium light either.

Zoomup said:

Which old people will be reading in the large grounds of this house at night under a Victorian style lamp post?

The lion, the witch and the wardrobe?

Really don't like the new LED street lighting on our street. Seems either too bright nearby or not bright enough a little further away. And instead of the dappled light through leaves of trees on the ground, you get something akin to the Predator chameleon effect, due possibly to the many point sources of light

gkenyon said:

I often like to sit out and read on a balmy evening ...

I do hope it is "light" reading Graham, and you are not reading the latest BS EN ..

Sadly, I've never been one for Mills and Boon, often my "light" reading being history, historical novels, etc.

I would recommend any of the following for a good holiday read (not an advertisement for the web-site on which they are listed BTW, just a convenient way of signposting):

https://www.amazon.co.uk/Samurai-William-Adventurer-Unlocked-Japan

https://www.amazon.co.uk/Archimedes-Codex-Revealing-Palimpsest-Blueprint/dp/0753823721

https://www.amazon.co.uk/1434-Chinese-Sailed-Ignited-Renaissance/dp/0007269552

https://www.amazon.co.uk/1421-Year-China-Discovered-World/dp/0553815229

https://www.amazon.co.uk/Lost-Empire-Atlantis-Historys-Greatest/dp/0753828855

https://www.amazon.co.uk/Who-Discovered-America-Peopling-Americas/dp/006223675X

Or one of Tom Holland's excellent books: https://www.amazon.co.uk/Tom-Holland/e/B000APEALK

I have found L.E.D. clip on lamps perfectly adequate for sheet music or books.

https://www.thomann.de/gb/adam_hall_sled_2_pro_led_light.htm?glp=1&gclid=CjwKCAjw9e6SBhB2EiwA5myr9h9AIl3DyvK0dvc1PdYEuhwbnk4ngOkUjd98J-_V0CMLbRYHwyXVThoCW4

Z.

I have found L.E.D. clip on lamps perfectly adequate for sheet music or books.

https://www.thomann.de/gb/adam_hall_sled_2_pro_led_light.htm?glp=1&gclid=CjwKCAjw9e6SBhB2EiwA5myr9h9AIl3DyvK0dvc1PdYEuhwbnk4ngOkUjd98J-_V0CMLbRYHwyXVThoCW4

Z.

Absolutely ... but as it's battery-powered ("pure DC") seems that this causes fewer problems for people. Another factor is colour temperature, which has improved dramatically with the more recent "mains replacement" LED lights.