Luminus SBT-90 gen2 5700K tested (SBT-90-WDS-F72-SA600 SA-H4, from Neal)

How tight is that black frame that the window sits on? In my mod I’m planning to ream the reflector so that it fits precisely around the frame. But it must not be sheared off the first time that I drop the light and the reflector applies sideways force on it.

It could just be the best performing SBT-90.2 I have tried so far….I don’t know? But here is what I got….

a. Warmed up the tint a bit…

b. Went from 358kcd to 408kcd (Original FT03 SST-40 GB Light)

c. Went from 5000lm to 5780lm at T/O (after I checked the throw so it was still pretty warm and battery drained a bit)

Sounds good. It looks like an uncoated window so I would expect maybe 5% loss from it, so the gain is a bit higher than you would expect from just the window.

Any comments on how rigid that black frame was?

It is glued on fairly well. I used a Feather platinum coated blade and worked my way around the LED pad, slicing at the seal little by little and being careful not to power thru and cut the bond wires…or slice off a hunk of finger…the blades a super thin and sharp, just keep the blade on the LED pad just under the steel frame of the lens…

.

Are these available for purchase to the public yet? If so who is carrying them?

Wendy…she has 45mm MCPCB’s also…

. Shenzhen Lantend Electronic Co., Ltd | Room228, Block B,Wanyuan Business Building,Chuangye Road 71 Area, Baoan district, Shenzhen city of China

M:+86 18938845498 | T: +86 27810810 | E-mail:wendy@lantend.com | web:www.lantendled.com

. Neal of Neal’s Gadget’s had some too…

I wonder how it compares to a dedomed 70.2 on output and throw?

I placed a small smooth reflector on top of the bare led that made a decent hotspot on my ceiling. I measured the tint of the hotspot at 4 currents.

current CCT duv CRI
0.1 A 5100 K +0.0164 67
0.5 A 5140 K +0.0152 67
2 A 5270 K +0.0122 67
10 A 5620 K +0.0061 67

The colour temperature is fairly neutral, at lower currents even significantly lower than Neal listed, and despite the high duv at lower currents I do not judge the tint as disturbingly green. The tint at 10 A looks quite perfect.

So these numbers are from different LEDs?

Yes…

GEN2 datasheet

Oh, it’s AR coated all right, both sides…

Thanks for the DS Jared, appreciate it!

thank you. i sent an inquiry to lantend. i’d really like a couple of these to try out. my concern was the position of the tint bin which is depicted in the data sheet as well above the bbl.

Lantend charges you the shipping, DHL at $35. So unless you’re getting several of them the shipping makes the price point pretty high. And of course, China is shut down between Chinese New Year and the Corona Virus, it would be very surprising if you got any response before Feb 8th as the government has instructed businesses to stay closed until then. Getting a package out of China may take quite a while with all that’s going on over there…

Neal has them as well, shipping should be more reasonable:

Neal is out of them, expecting to restock after Chinese New Years.

Any chance you took before and after readings?

I made other changes that pretty much make a before/after irrelevant, couldn’t know how much effect the window had as compared to the other changes.

For example, I filed off the corners of the base of the reflector to be sure the reflector didn’t short against the lead wires. I changed from 18ga Teflon coated lead wires to new 18ga Superworm leads. The missing frame and window allowed the reflector to seat further down and rest on the substrate, changing the whole scheme of things.

FWIW, it made 352Kcd before, now it makes 358Kcd. It was making 4240 lumens at start, now it shows a very brief 5180 before falling. This is in the 53mm reflector of the Crelant 7G5. It makes 4200 at 30 seconds now, cell down to 4.05V.

I removed the window from another 90.2 that’s in my SS/Cu X6, switched to an Eagle Eye X6 reflector (not threaded as this lights reflector was). When I built it the lumens at start was 5190 from 25.5A at the tail (Samsung 25S cell, Bistro driver) Lux was 106Kcd.

Now it makes 5630 lumens at start through an UCLp lens and 4880 lumens at step-down (almost 30 seconds) hot little mamma jama coming off the light box! About to get a lux reading, cell is recharging…

Edit: Now reads 116.5Kcd at start, 112.5Kcd at step-down. Serious heat being made, the big copper head on this X6 do get HOT!

So it is safe to assume that removing the window will add ±10% lumens and throw?
Is there any side effects to removing the window?