One piece of feedback we receive often has to do with the size of the Surna Reflector. At 33×32” inches, the Surna Reflector is larger than most reflectors on the market, but for good reason.
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As discussed previously, it is important to make sure the correct measurement is being considered when choosing a bulb or reflector. Lumens measure brightness as seen by humans, but PPFD measures light density as seen by plants.
Before we get too far into this, there are a few terms that need to be broken down first: