Review: Zeusray FL05518 Domed & De-Domed

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hank
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> yellowish circle band

Let me try a handwaving answer; someone I hope can point to a source with a proper picture of the structure and light path that will be clearer.

All “white” LEDs use a blue-white emitter underneath a layer of phosphor that glows yellow-white.
The light path going through all that plus the lens is giving you an image of the original source.
If you were to look very closely at the emitter (don’t do this without a filter, it’s too bright) you’d see that variation due to the difference in thickness of the phosphor (and maybe of the dome as well) and the variation of brightness of the emitter underneath. If you look closely at the tightly zoomed image of the emitter it’s slightly brighter on the side where the wires connect, and slightly bluer.
If you look at the widest zoom you’re seeing almost none of the central, slightly bluer, direct light, and more of the edges that are lit mostly with the phosphor color.
You also get bands of bright/dark/bright along the edges of the circle, there’s a name for that effect that I’ve forgotten.

BLightSam
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hank wrote:
> yellowish circle band

Let me try a handwaving answer;

Checked my other zoomies and they all have varying amount of yellow band. With Zeusray this effect is more pronounced because it’s the brightest zoomy and thus contrast is more pronounced. Thanks for the answer.
sesgum
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Ordered. or pre-ordered… Sad

BLightSam
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Is there a De-domed Chimney shot? I see only Domed one.

Chicken Drumstick
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The first 2 distance shots are domed and de-domed.

BLightSam
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Chicken Drumstick wrote:
The first 2 distance shots are domed and de-domed.
Somehow missed those. Comparison of the illumination of the tree by domed and de-domed shows the marked brightness improvement with de-domed.
light junkie
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I just haven’t had the time to put it back together, yet :~

Lj

cajampa
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I dedomed one of my zeusray’s yesterday, so far i am not sure how i feel about it.

A bit less output but nicer warmer beam but i think i messed up the heatsinking by dissolving the heatpaste because it get much less warm now and thats possibly the reason for less output.

I will try to reapply some and see if that improves things, another issue i had was i just dunked the whole pill in gas for like a day but i forgot to remove the o ring, so it got completely stiff and i had to use the bottom one instead, and it is slightly to small so the head wobbles some when i zoom now.

Do anyone know where i can buy some o rings that would fit?

Lancman
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Dealmetic got another batch in but the numbers are dropping fast….. Wink

BLightSam
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cajampa wrote:
I dedomed one of my zeusray’s yesterday, so far i am not sure how i feel about it.

A bit less output but nicer warmer beam but i think i messed up the heatsinking by dissolving the heatpaste because it get much less warm now and thats possibly the reason for less output.

I will try to reapply some and see if that improves things,

Any update on why de-domed did not perform better?
cabfrank
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Tis the season. The new batch is sold out and it is on backorder again.

cabfrank
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I think Dealmetic owes Chicken Drumstick a free light, or, at least, a very big thank you.

LumenHound
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I purchased mine on the evening of the 17th and it arrived on the 24th.
The Hong Kong postage paid decal on the bubble mailer envelope was dated 18.12.2014.
That’s a new record for fast shipping from China based businesses for me.

cajampa
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BLightSam wrote:
cajampa wrote:
I dedomed one of my zeusray’s yesterday, so far i am not sure how i feel about it.

A bit less output but nicer warmer beam but i think i messed up the heatsinking by dissolving the heatpaste because it get much less warm now and thats possibly the reason for less output.

I will try to reapply some and see if that improves things,

Any update on why de-domed did not perform better?

Sorry i haven’t tried yet, i had 2 zeusrays and i gifted the unmodified one for Christmas so i can’t compare domed to dedomed anymore but i have ordered a new one.

All my modding time was spent upgrading some Enlan & Sanrenmu knifes for gifting, but i will get back to the zeusray when all my family & relatives leave after the holidays :santa: i update here when i do.

BLightSam
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cajampa wrote:
but i will get back to the zeusray when all my family & relatives leave after the holidays :santa: i update here when i do.
No hurry, just curious. Happy holidays!
cajampa
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BLightSam wrote:
cajampa wrote:
but i will get back to the zeusray when all my family & relatives leave after the holidays :santa: i update here when i do.
No hurry, just curious. Happy holidays!

Yeah i am curious to, i miss my little handwarmer Wink

Chicken Drumstick said that it pulled less Amp, 3.75A for domed and after the dedome 3.43A, so that could also be a factor, or that i perceive the light as less bright when it is less blue, it is hard to know because it is my first dedome.

I wonder if the hot dedome lower the Amp like the gas one?

It could also be that a warmer light is less contrasty than the more blue white light so that is why i perceive it to be less impressive outside, i still like it more as a in house light now when dedomed because it is less jarring blue and a nicer warmer light.

And Happy Holidays to you to Smile

BLightSam
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cajampa wrote:
Yeah i am curious to, i miss my little handwarmer Wink
:bigsmile:
Quote:
Chicken Drumstick said that it pulled less Amp, 3.75A for domed and after the dedome 3.43A, so that could also be a factor, or that i perceive the light as less bright when it is less blue, it is hard to know because it is my first dedome.

I wonder if the hot dedome lower the Amp like the gas one?

It could also be that a warmer light is less contrasty than the more blue white light so that is why i perceive it to be less impressive outside, i still like it more as a in house light now when dedomed because it is less jarring blue and a nicer warmer light.

And Happy Holidays to you to Smile

There is a marked brightness difference if you look at the illumination of the tree by domed and de-domed. The tree by de-domed is markedly brighter than the one by domed in the above pics by Chicken Drumstick. I am just puzzled why you don’t get the marked increase in brightness when all involves is simple de-doming the emitter.
cajampa
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But thats the throwyness aspect of it if you look at the house roofs beyond the foliage it is clear that the beam is like half as wide so it is a lot brighter in the center only and the warmer hue could also illuminate the green shrubbery more intensely.

If you look at the sky part of the beam in that picture you see that there is a lot more green in the hue than the domed much bluer beam so guess it fits that it looks brighter also from that it now contain more green in the light.

EDIT
I just have to add that i am not discounting that there is something wrong with my light the heatsinking is still of or it dropped the Amp a lot, i wonder if Chicken Drumstick dedomed also got a lot less warm in the hand after the dedome?

Fritz t. Cat
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There is a lot of excitement about the Zeusray, but the increase in performance over the old SK-73 is not large. The SK-73 still has advantages. The biggest improvement is the price.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

cajampa
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Fritz t. Cat wrote:
There is a lot of excitement about the Zeusray, but the increase in performance over the old SK-73 is not large. The SK-73 still has advantages. The biggest improvement is the price.

The SK-73 looks nice, can you tell me what kind of advantages it has? what do you get for the higher price?

cabfrank
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The Zeusray has an (not large) increase in performance and a lower price. Sounds good to me.

Fritz t. Cat
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It is shorter (won’t take most protected batteries). The shape is a little smoother. Probably more waterproof. Maybe other small differences.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

cajampa
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Ok thanks for the answer, but that i can use protected batteries i see as an advantage for the zeusray, i gifted one plus a evva protected battery and a charger for Christmas and it was very well received :santa: for just 25$ that is a very affordable deal.

If the SK-73 has low volt protection it could be an option, do you know if it has that on the stock driver?

BLightSam
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cajampa wrote:
EDIT
I just have to add that i am not discounting that there is something wrong with my light the heatsinking is still of or it dropped the Amp a lot, i wonder if Chicken Drumstick dedomed also got a lot less warm in the hand after the dedome?
Can you measure the tailcap current? Noticed that with the stock light tailcap, in addition to body tube, also get slightly warm. Does the de-domed tailcap get warm up?
cajampa
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I did just with super short fat wires, i got 2,43A but with the battery at 3,80v
I will recharge my battery to take measurement at full charge and update.

And thanks for getting me to fix some proper wire for my DMM, i foresee lots of accurate tailcap measurement in my future Smile

hank
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Has anyone built a board that could simply drop into the tailcap to add low voltage/discharge warning or cutoff?

Has anyone got a reliable test for unknown drivers to determine whether or not they provide low voltage warning or cutoff?

I understand the warning (a couple of blinks) is more common than an actual cutoff (or drop to moonlight first, or whatever).

Just seems the more flashlights I come across, the less sure I can be about what their drivers will do.

cajampa
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New test, battery Panasonic NCR18650PF at 4,16v the dedomed pulls 3,3A with the same test wires i used before.

BUT i found some even thicker wires and those show…….4.0A…….
what…… i couldn’t believe it so i charged up the battery again after i used it some and got exactly the same results, for some reason messing about with it taking it apart and putting it back together + multiple times of measuring the tailcap current seems to have fixed it somehow, now i don’t believe i get 4A with the tailcap on because this switch is known to induce losses and it still takes longer to get nice and toasty in my hand than i remember my domed ones did.

At first i thought i had just been stupid and used different charged batteries for the domed & dedomed but i clearly remember double checking, by switching batteries multiple times and using the same battery in both just to be sure, always with the same result.

I am not really sure what to think of this it feels brighter outside now but it is a very different weather out now -15 celsius and much moisture in the air now vs 3+ and very dry air so i can’t really compare before i get my new stock zeusray.

And i charged up a Samsung 20R to 4,19v……….but the Amp reading on my DMM is dead Sad i don’t know what happened but it doesn’t work anymore i guess i shorted it somehow? so no more reading before i get a replacement Sad and i learn how to not destroy my equipment, any pointers guys?

Fritz t. Cat
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cajampa wrote:
Ok thanks for the answer, but that i can use protected batteries i see as an advantage for the zeusray, i gifted one plus a evva protected battery and a charger for Christmas and it was very well received :santa: for just 25$ that is a very affordable deal.

If the SK-73 has low volt protection it could be an option, do you know if it has that on the stock driver?


I don’t think it has low voltage protection. I would also choose the Zeus and a protected cell as a gift. It is not a boost driver, so the cell can’t get more discharged than slowly approaching the XM-L’s minimum forward voltage.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

guitar89
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Just to ask, I’m trying to dedoming using thinner (and also anothere attempt with gasoline 95).

Could I just soak it with the brown disc together, or thinner/gasoline will damage the brown disc ?

Omega_17
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Better to only soak the LED if you can. That a terrible bad idea to soak the whole pill in gasoline ! Flat Stare (not even mentioning the serious fire hazard)

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