I believe it does, and it is precisely how constant output, or more commonly referred to in the industry as constant brightness, is achieved. How else can be it be achieved? Do you at least acknowledge that constant brightness exists as a feature in some drivers and lights?
As far as I am aware, up until very recently, this year, every implementation of FET drivers utilized PWM, therefore, are not necessarily constant current. If the FET is implemented as constant current without PWM, this is not something the manufacturer should hide, but instead market thoroughly as a superior implementation.
As does current.
I would assume this is indeed because constant current, referring to a constant stream of current without interruption, is strictly not current regulation, which is keeping a current regulated, i.e. increased or decreased (below the threshold of what the cell can provide) to achieve constant brightness while the cell can still hold that current before stepping down and then holding a lower brightness while the cell current can hold that lower brightness, before stepping down again, etc., as is indicated quite clearly in the output chart I stole from a 1lumen review and posted above.
So you’re saying there is no such thing as a driver that provides constant brightness. I think this is a straw man, as I’m not arguing anything about linear drivers, only the clear distinction between a driver’s constant current feature and a driver’s feature of current regulation, the latter which provides constant brightness. These terms are very commonly used to describe these specific and distinct features whether you’re aware of it or not.
That may be, but colloquially, while current regulation may be applied in many ways, when it is discussed as a feature of a driver that a consumer might be interested in, it is always referring to constant brightness, because one causes the other, so they may often be used interchangeably even if one is not the other, but again, one causes or provides the other.
Perhaps because language evolves and the lords of electronics and design are not in charge of language. Within the scope of driver features that may appear in a list a consumer might consider, there is no ambiguity between the two terms. I admit perhaps in the circles and rhetoric of electronic engineering they may become synonymous or ambiguous, but not the meanings of how they are commonly used to describe two very different driver features to a consumer and end user, and further, the mere word “regulation” is used interchangeably with “current regulation,” as in the sentences, “at the end of the cell’s capacity, you can see on the runtime chart where the driver drops out of regulation into a low output direct drive,” or “when the cell can no longer provide enough current, the driver drops out of regulation and implements PWM until the cell is depleted.” These are full of specific meaning, and I have trouble believing you don’t understand. I think you just want everyone off your lawn.
