I saw these posts that interested me in the "The future of SON thread."
Going abit off topic here but what are the wattages on induction like? If they are similar to that of LED and with there long life they could well pose a threat to SON. Induction lamps are very much a minor niche market. They have been around for more than 25 years - I remember them being demonstrated on Tomorrow's World back in the 80s. They have never caught on due to their cost and relatively low lumen output which isn't suitable generally for streetlighting purposes. They do offer superior lifetime over CFL but the high cost doesn't outweigh the lifetime advantage.
If you want long life time (in theory..) white light nowadays you choose LED. Induction is no threat to SON, LED will make induction obsolete.Okay thanks for that, I've never in person seen induction used. I have seen the price of the lamps though and even if they do have superior life the bulb price and efficiency would put anyone off.Quite interestingly, despite the reasons Phosco152 has given, Ceredigion are replacing pretty much everything with lanterns running induction lamps. They crop up both retrofitted and on new columns and between heights of 5 and 10 metres. Most commonly seen fitted with nodes and part-night cells as well. They are mainly replacing old SOX and newer SON lanterns.
I've looked on the Urbis and WRTL websites but it doesn't state these lanterns come with this lamp type, so I'm wondering if anyone knows anything else about wattages per mounting height, please share as I am quite interested to know. Particularly as I can put the wattages to my photos.
Here are some installations in Aberystwyth running induction lamps:
My photos do only showing Arcs running them, but we do have many Sapphires and a few Iridiums running them too.