Help deciphering LED data sheet (SST-90)

[Rando]

Looking at this data sheet:

And given the SST-90 WL-DF from 4Sevens:

I see WL bins WL1 - WL3 at the bottom of page 4 of the document. (600-665 minimum lumen @ 3.15A).

My questions are this:

1) How do I know if it's a WL1, WL2, or WL3? Is 4Sevens not giving enough information in the description to determine this?

2) If I buy the 9A driver from Der Wichtel, how do I determine the lumen output of a given bin @9A?

Who else has a good price on SST-90s?

Thanks, geniuses. :thumbsup:

 

[yazovyet]

looks like not enough info to tell which of the WL bins, i suppose you could email them and ask.

see the graph on page 10, that shows you that at 9A you will get around 270% of the bin's luminous output. so take your bin's lumen rating and multiply it by 2.7.

so i think the best you can do is say that it will be 600-700 *2.7 to end up with 1620-1890 lumens. if you are concerned with what you are getting i would recommend asking them for the actual numbers/code accosiated with the item. the reason i say that is that as far as i can tell there is no WL flux bin with a DF tint. while you're at it, tell them their links to the luminus website don't work.

 

[Rando]

Awesome, that graph on page 10 was exactly what I was looking for. I must have overlooked it in the beginning.

Thanks.