Thank you guys for your suggestions and various considerations. The ducts are old drywall & cement made, very uneven dotted with cement irregular dark inside wall surface, somewhat dirty, with some pipes running inside the ducts, definitely not smooth bright aluminum ducts. Access to the flashlight is limited once inserted into the duct via a narrow hole made in the duct wall. That makes it more difficult to adjust flashlight to zoom on a particular spot along its length. A portable endoscope camera with a circle of mini lights around its glass is inserted into the duct in a plastic protection pipe to push it through the duct. So the cam adjustability is limited too. What would be the best flashlight choice for these conditions? I tried an ordinary $5 CN flashlight, and it illuminates the duct just around its mount point, but the remote light is all consumed by the duct walls, so useless. The purpose is to assess pipes condition running inside the ducts mounted along the duct side and bottom walls.
Hmm, that worries me a little. I tried 3xLH351D 5000K 80CRI and found it also looks greenish. I figured the 90CRI ones wouldn’t have that issue though.
Maybe I’m just not running it at a high enough power to get good tint. Djozz noted the LH351D tends to get a bit green at low power, and most of the time I’m using only the 1x7135 power channel on a triple or a quad. So it’s 87 to 117 mA per emitter, and that might be low enough for the green effect. Not sure.
Most emitters are more white when running at higher power levels… but the range I care most about is under 150 lumens. And on a triple or quad, that’s only 40 or 50 lumens per emitter. So I guess I tend to select emitters for their tint at low levels like that. I should probably use single-emitter lights instead, but triples and quads seem more popular lately.
The LH351D 4000k 90CRI version is yellowish on the verge of green. It does get better at higher brightness but still not nice like the 219B 4000k. The two groupbuys for the LH351D used the T7 and T6 bin. If we can somehow get our hands on the T3 or T4 bin would be ideal for the FW3A.
Just received my silver/white D4 directly from Hank. Took 17 days from day of order . My first Emisar and loving it. The more I use side switch lights the more I think they will be the only type I buy from now on , especially with ramping. The UI is perfect and the thermal step down works flawlessly. Being able to get momentary on is also a plus. Tonight I get to put it through it’s paces if it would stop raining every single day. Emisars are actually more attractive than pictures do them credit. I see more in my future.
The HVAC pics are a tough situation. Needs to be small for insertion and control, yet needs to make enough light for a demanding job, while not getting hot or stepping down. Most of the lights that can produce enough light to do this will step down in short order, or are too large for the situation. So I’m thinking the D4, the new D4S, or the DQG Tiny 7 XP-G2 lights are probably more inline with this odd situation. The new D4S will have the large cell and some programability, the DQG might get too warm and at higher levels will step down, maybe too soon. The D4 at the necessary power levels will probably get too hot.
An Raysoon F13 modified triple with CUTE-3 also uses the 26650, can be fit with a nice heat sink, would offer output and run time with program options through firmware selection, but of course this would be a build and not a readily available light.
Mateminco has a triple X6 coming out, quite floody, makes around 3000 lumens, can run quite long in the 6th of 7 levels without getting too hot, might be a likely candidate as well. Run time would be more limited due to the smaller cell size (18650)
Sofirn C8F triple? Decent price, not too large, in the 3000 lumens vicinity. Tends to be more throwy than the Mateminco X6 at similar output levels, both use the 18650 cell.
Mateminco X6 triple
Check those out Zamar and see what you think, none of them should be extremely pricey, all are worthy fairly high powered lights. The Mateminco might not be available just yet…
Thanks again. What battery makes & models do you recommend for these flashlights? Are they sold anywhere on cheap? Some 50mm diameter flashlights I seen require 4x18650 batteries. Are these any better for my purpose than 1x18650 flashlights above, and which models?
As far as scratches goes I can’t help. As tar as the temperature setting goes you likely need to recalibrate. From page 1 of the thread,
10+ fast clicks then press and hold: Thermal config mode, added in v2. Hold the button until it gets to the action you want:
Blinks out current temperature limit. Release button to exit with no changes, or keep holding to continue.
“Buzzes” for 2 seconds. Release button to set temperature limit to maximum, or keep holding to continue.
Light goes to turbo. Hold button until the light feels hot enough, then let go to set a new temperature limit.
If you are adventurous you can put we firmware like Anduril
Yes, I’ve had it recalibrated already. Its now set at 65 and given the limit is 70, there is not much leeway left for higher settings. It would be nice if there would be higher limit. Or a more precise temp sensor.
I’m adventurous but I know myself - once I disasseble something its never the same again… And not in a good way
I don’t believe ( others may correct me) but I don’t think you can set the temperature with the original firmware. But once you set it up the way you want there’s no need to change it again.
If its not working for you then you need to change firmware or get a bigger light.