Sodium lamps produce quite a bit more light, watt for watt. They also run at a higher operating temperature.
Lumens aren’t really a relevant measure of light for horticulture, but just for the sake of comparison I think 1000w halides are in the 110-120,000 range whereas the Hortilux Super HPS was marked at 145,000.
No need to second guess what you’re seeing, you’re on the money
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