Rolla J
Well-Known Member
Good looking out bro!
QB, strip LEDs or COBs?
- Thread starter Nugachino
- Start date
https://www.arrow.com/en/products/sl-b8v7n90l1ww/samsung-electronics?utm_source=findchips&utm_medium=aggregator&utm_campaign=arrow_findchips_2017&utm_content=inv_listing
Are these worth the price? Data sheet says 150 lm/w at max current anyone know how many lm/w at 700ma?
Are these worth the price? Data sheet says 150 lm/w at max current anyone know how many lm/w at 700ma?
nfhiggs
Well-Known Member
Not worth the price, IMO. You generally get about a 10% increase in efficiency when you cut the current by half. So at 700 mA, you'll probably see ~165 L/W or so - probably about 4.5K lumens total. For under $30 you can get four Bridgelux strips with similar efficiency and similar total lumen output (4.9k at 700 mA):
http://www.buy-components.com/components/bridgelux/BXEB-L1120Z-40E4000-C-A3.html
I was thinking they would provide better penetration because of more chips in a smaller space. Also you linked the 4k for the bridgelux so that gives it a little edge it seems like the bridgelux is a little less efficient at half the current of the samsung.
nfhiggs
Well-Known Member
159 l/w at 700 mA vs 150 l/w at 1350 mA the efficiency is close enough to be a wash. Lumen output is comparable as well with both at 700 mA. Probably a similar number of diodes as well, since the voltage, current and total lumens is so similar. 4000k vs 3000k... To me, 3000K just isn't worth 4 times the price.
Try taking a look at the Samsung F series strips, they are more efficient, and more diodes for half the price from what I have seen.
welight
Well-Known Member
Serva
Well-Known Member
Maybe I got something wrong, than please unconfuse us!
Arrow: USD 7.04 (worldwide free shipping >20$)
Digi-Key: USD 7.41 (+0.37) (worldwide free shipping >50$)
Cutter: USD 9.12 (+2.08 ) (worldwide free shipping?)
What do you mean? I pay 30% more, ordering at your place. And whats the shipping cost, for orders over 20/50$ (worldwide)? When I try checking out, I see the price suddenly double because of your shipping costs.