Halo
(Halo...)
November 21, 2014, 10:00pm
1
$5 FastTech LG 480LM 6500K 16mm (5 pack)
LG H35C1 Series Datasheet http://led.lginnotek.com/
Fits on a cree star.
LG tint codes: 6500 F , 5700 G , 5000 H , 4000 J , 3500 K , 3000 L , 2700 M
Example: LEMWA33X75G W00(L1C)LG3535 (link ) is 75 CRI 5700
Aliexpress has all tints except 3000. LG3535 search , LG 3535 search . Some nice 80 CRI 4000K $11.98 / 10 pieces
Dedoming: James3, post #30 . Phosphor not attached well to the die, peeled off.
Interesting, seems alot like a XP-G, I really like the 5000K “H”
Not a bad price either
Looks like they might reflow just fine on a XR-E/XP-G pad as well
Halo
(Halo...)
November 21, 2014, 10:19pm
3
If you notice FT has them on cree stars already.
Halo
(Halo...)
November 21, 2014, 11:06pm
5
I hear the application of some heat can cause an led to come loose from its star. H)
Pulsar13
(Pulsar13)
November 21, 2014, 11:33pm
6
Hmm… better than XPE for the same price.
I like the 8mm boards - candidate for smaller lights swapping.
Where do you see the 5000K one? I only see three versions of 6500K pure white at FT.
Halo
(Halo...)
November 21, 2014, 11:54pm
7
There is a bunch on aliexpress. I don’t know what tints, need to check model numbers against the datasheet.
Omega_17
(Omega_17)
November 22, 2014, 1:11pm
8
Comparing the Cree and LG datasheets… The LG put out more light ! And even better, the lumens is the same at 6500k, 5700k or 5000k.
XP-G2 S2 - 700mA = 271 lumens 1000mA = 360 lumens 1500mA = 488
LG H35C1 - 700mA = 292 lumens 1000mA = 390 lumens 1500mA = 533
CRI is the same, around 70 for the brightest.
Halo
(Halo...)
November 22, 2014, 1:29pm
9
I’m afraid you can’t compare them directly. Cree’s XP-G2 numbers are at 85°C whereas LG’s numbers are at 25°C.
JamesB
(JamesB)
November 22, 2014, 1:47pm
10
Cree gives the 25° junction temp numbers too, at 350mA a XP-G2 S2 gives 20 more lumens at 25° than at 85°.
Best output of the LG at 350mA 25° seems to be 162, and 168 for a XP-G2 S2 at the same temp.
The Vf looks slightly higher on the LG though and it’s getting worse as the current goes up.
pommie
(pommie)
November 22, 2014, 1:50pm
11
Omega_17:
Comparing the Cree and LG datasheets… The LG put out more light ! And even better, the lumens is the same at 6500k, 5700k or 5000k.
XP-G2 S2 - 700mA = 271 lumens 1000mA = 360 lumens 1500mA = 488
LG H35C1 - 700mA = 292 lumens 1000mA = 390 lumens 1500mA = 533
CRI is the same, around 70 for the brightest.
LG H35C1, more lumins per Amp yes, but draws more Volts.
LG H35C1 at 1500mA = 3.36v
XP-G2 at 1500mA = 3.1v
XP-G2 at 1500mA = 4.6W for 488lm is 106lm per W
LG H35C1 at 1500mA = 5.04W for 533lm is 105.8 per W
Basicly they are the same, the LG H35C1 is about 9% brighter (for the same Amps), however the lower voltage of the XP-G2 gives it the edge for runtime.
The BIG difference is in price and the LG H35C1 wins hands down there :bigsmile:
Cheers David
Halo
(Halo...)
November 22, 2014, 1:56pm
12
Added LG tint codes, CRI and aliexpress links to OP.
JamesB
(JamesB)
November 22, 2014, 1:53pm
13
pommie:
Omega_17:
Comparing the Cree and LG datasheets… The LG put out more light ! And even better, the lumens is the same at 6500k, 5700k or 5000k.
XP-G2 S2 - 700mA = 271 lumens 1000mA = 360 lumens 1500mA = 488
LG H35C1 - 700mA = 292 lumens 1000mA = 390 lumens 1500mA = 533
CRI is the same, around 70 for the brightest.
LG H35C1, more lumins per Amp yes, but draws more Volts.
LG H35C1 at 1500mA = 3.36v
XP-G2 at 1500mA = 3.1v
XP-G2 at 1500mA = 4.6W for 488lm is 106lm per W
LG H35C1 at 1500mA = 5.04W for 533lm is 105.8 per W
Basicly they are the same, the LG H35C1 is about 9% brighter (for the same Amps), however the lower voltage of the XP-G2 gives it the edge for runtime.
The BIG difference is in price and the LG H35C1 wins hands down there :bigsmile:
Cheers David
Pommie the lumens number you used are not at the same junction temp LG’s are at 25° cree’s are at 85°.
Bottom line : Cree still more efficient.
pommie
(pommie)
November 22, 2014, 2:16pm
14
You are right, I just used the lumens stated in the post above mine,
To even the playing field the figures for the XP-G2 S2 at 1500mA, junction temp of 25c.
lumens 553.4 - 3.25v, 4.874W, Lm per W = 113.6 <—- from Cree’s data.
So the Xp-g2 S2 is brighter and more efficient
But the difference can’t get past the price of the LG H35C1.
So now the question is how hard can the LG H35C1 be pushed J)
Cheers David
JamesB
(JamesB)
November 22, 2014, 2:42pm
15
Yep, competition is good for the consumer :party:
how2
(how2)
November 23, 2014, 9:28am
16
Where does the Samsung LH351A and LHA351B fit into this?
Is the LH351A same as XP-G and the LHA351Bsame as XP-G2?
Tha Samsung LH351A can be had for $1
pommie
(pommie)
November 23, 2014, 10:19am
17
Looking at the two data sheets I would have to say yes, the B is an update to the A and is that bit better.
LHA351B specs,
Tj at 85c
1500mA = 3.29v
Top bin at 6500k 441lm
No lm per watt given soooo…
1.5A x 3.29v = 4.93w
441lm / 4.93w = 89.5lm per Watt <—- 20~25% less than XP-G2
Cheers David
Manual_Man
(Manual Man)
November 24, 2014, 11:01pm
18
As others have stated the XP-G2 is still better, +Cutter now has XP-G2 in S3.
djozz
(djozz)
November 24, 2014, 11:09pm
19
Thusfar I have always been disappointed by the high current on copper performance of any other led than Cree, or rather, by the absurd out of spec performance of the Cree leds (why do they make them like that?).
djozz:
Thusfar I have always been disappointed by the high current on copper performance of any other led than Cree, or rather, by the absurd out of spec performance of the Cree leds (why do they make them like that ?).
Cause this is America. Need I say more.