Reddit reviews SOX90 WATT LOW PRESSURE SODIUM LIGHT BULB 30,000 HOURS SUPRA LIFE - T21 SHAPE - BY22D BAYONET BASE SOX LAMP 90 WATTS"
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HID Light Bulbs90 WattsLow Pressure Sodium Light BulbLong Life
There's a wall light here that went out recently, and I've never seen this kind before. From the label "Use only Type T21, 150 Watts Max" it looks like it's a "T21 bulb"?
I searched online for where I could get a replacement, and all the links are over $100. For example, https://www.amazon.com/SOX90-PRESSURE-SODIUM-LIGHT-HOURS/dp/B000STF83M/ is $135 + $10 shipping.
My questions (if anyone is knowledgable about this kind of bulb) are:
Thanks for any help!