Why is 50w HPS native to New England? « on: January 21, 2021, 09:18:10 PM » Author: CreeRSW207
I’m curious to why 50w HPS street lights are so common in New England but are so rare elsewhere. I also heard that 100w MV and 105w Incandescent was used primarily in New England, was there a reason that is? It also seems that 310w and 200w HPS seems native to The Western states.
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	Re: Why is 50w HPS native to New England? « Reply #1 on: January 21, 2021, 10:10:49 PM » Author: wide-lite 1000
310 + 200w HPS are lumen equivalent for 1000w + 700w MV . 50w HPS is equivalent to 100w MV . I'd guess they just wanted low level lighting .
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	Re: Why is 50w HPS native to New England? « Reply #3 on: January 22, 2021, 02:01:44 PM » Author: CreeRSW207
Quote from: joseph_125 on January 21, 2021, 11:58:22 PM I guess they were intending on matching lumens rather than watts. Over here we retrofitted 400w MV clamshells to 200w HPS cobraheads in the 90s/ See here in New England, they replace 1000w MV with 400w HPS, 400w MV with 250w HPS, 250w MV with 150w HPS, 175w MV with 100w HPS, 100w MV with 50w HPS.
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	Re: Why is 50w HPS native to New England? « Reply #4 on: January 22, 2021, 02:07:26 PM » Author: HPS_250
Quote from: CreeRSW207 on January 22, 2021, 02:01:44 PM See here in New England, they replace 1000w MV with 400w HPS, 400w MV with 250w HPS, 250w MV with 150w HPS, 175w MV with 100w HPS, 100w MV with 50w HPS. That all makes sense, as they are replacing MV lamps with their lumen equivalent HPS lamps. Did they ever use 200w or 70w HPS?
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	Re: Why is 50w HPS native to New England? « Reply #5 on: January 22, 2021, 02:10:45 PM » Author: CreeRSW207
Quote from: HPS_250 on January 22, 2021, 02:07:26 PM That all makes sense, as they are replacing MV lamps with their lumen equivalent HPS lamps. Did they ever use 200w or 70w HPS? Yes, NHEC barely uses 50w HPS, being all 70w for smaller roads. Eversource and Unitil sometimes use it. Some places in Maine have it too. No 200w HPS from what I’ve seen.
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	Re: Why is 50w HPS native to New England? « Reply #6 on: January 22, 2021, 11:31:37 PM » Author: wide-lite 1000
Ohio is full of both 200w and 310w HPS.
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	Re: Why is 50w HPS native to New England? « Reply #7 on: January 23, 2021, 01:19:59 AM » Author: Cole D.
I know in some places in the northeast they even used 35W HPS. In my collection I have a 50 W HPS NEMA head. I think it would be nice for home use, because of lower energy costs.
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	Re: Why is 50w HPS native to New England? « Reply #8 on: January 23, 2021, 01:32:13 AM » Author: dor123
Perhaps New England streetlighting are similar to the streetlighting in the EU. In Europe, when they moved from mercury to HPS, they used lower wattage HPS to save energy while retaining the same amount of light. In North America and Israel on the other hand, the wattage rating remained the same when moved from MV to HPS, as to increase the light output without energy saving, and they used high wattage lamps.
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	Re: Why is 50w HPS native to New England? « Reply #9 on: January 23, 2021, 08:39:30 AM » Author: CreeRSW207
Quote from: dor123 on January 23, 2021, 01:32:13 AM Perhaps New England streetlighting are similar to the streetlighting in the EU. In Europe, when they moved from mercury to HPS, they used lower wattage HPS to save energy while retaining the same amount of light. In North America and Israel on the other hand, the wattage rating remained the same when moved from MV to HPS, as to increase the light output without energy saving, and they used high wattage lamps. Perhaps, I wonder if this goes back to the incandescent days if it was only New England that had 105w lights.
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	Re: Why is 50w HPS native to New England? « Reply #10 on: January 23, 2021, 08:40:22 AM » Author: CreeRSW207
Quote from: Cole D. on January 23, 2021, 01:19:59 AM I know in some places in the northeast they even used 35W HPS. In my collection I have a 50 W HPS NEMA head. I think it would be nice for home use, because of lower energy costs. Yes, Canton MA has some.
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	Re: Why is 50w HPS native to New England? « Reply #11 on: January 31, 2021, 01:26:10 AM » Author: LightsoftheWest
Washington is full of 250W, 310W, and 400W HPS. 50W and 150W is uncommon here.
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	Re: Why is 50w HPS native to New England? « Reply #12 on: February 01, 2021, 09:53:39 AM » Author: CreeRSW207
Quote from: LightsoftheWest on January 31, 2021, 01:26:10 AM Washington is full of 250W, 310W, and 400W HPS. 50W and 150W is uncommon here. Really? I never knew how rare 150w HPS was!
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	Re: Why is 50w HPS native to New England? « Reply #13 on: February 01, 2021, 10:07:10 AM » Author: Rommie
Plenty of them over here. Not so many 175W mercs though.
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	Re: Why is 50w HPS native to New England? « Reply #14 on: February 01, 2021, 11:37:41 AM » Author: alexd120
I have few 150w hps bulbs and a 150w hps ballast.
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