Coast Polysteel 600 taking apart

8 posts / 0 new
Last post
Bort
Bort's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 06/01/2012 - 17:15
Posts: 7455
Location: Holding the proverbial flashlight
Coast Polysteel 600 taking apart

This is not a common light so not sure if any BLFers will have one, but its a 4AA zoomie that i’ve owned for a while. Its not a traditional zoomie, and has a design flaw, its heatsink (and the rest of the light) are encased in plastic, making it impervious to ano damage but not letting the heat out.
When i first got it i ran it for 1/2 hour on high (600 lumens) which partially melted the battery carrier and caused the light to start flickering intermittently. Since then the light died and no longer lights up, but Coast did send me a warranty replacement and told me to toss the light.

There is no apparent way to take it apart, it appears the head is glued together, think SK68 head glued together. Any ideas on how to get it apart. Glue dissolver or anything like that? In the end if i destroy the light it does not matter since its been replaced and i now know high is to only be used for 5-10 mins (would be nice if they added that to the instructions, or had a turbo timer or temperature stepdown).

Its a nice light, i like 4AA, its body can’t be damaged by dropping on concrete/asphalt but the battery carrier is hard on battery labels, and the heatsinking is not well designed Sad

I would like to get it apart without damage if possible and repair it, but like i said it can be destroyed but who on BLF can condone trashing a flashlight, that would be practically sacrilege 8-)

description of light
https://coastportland.com/product/polysteel-600/

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

Terry Oregon
Terry Oregon's picture
Offline
Last seen: 7 hours 46 min ago
Joined: 10/21/2017 - 17:03
Posts: 486
Location: Beaverton Oregon

Commenting 21 months later. . .

Quote:
the heatsinking is not well designed

Based on my tests, I would have to agree . . .

It sounds like, Bort, that the regulation failed on the 1st light.

I just purchased one of these and ran some runtime tests with a light meter (Dr Meter LX1330B).  I'm not measuring total output in lumens (that takes a setup I don't have), but rather the reflected light off a ceiling in small room to measure the CHANGE in output over several minutes. 

 

Damn, this thing engages in extreme regulation from initial turn-on (both high and medium).

Note1: any reference to lumens is under the assumption that Coast's listed spec is correct (high 710lm, mid 300lm). Reflected readings on the lightmeter were interpolated to lumens.

Note2: New Panasonic Pro Eneloops were used and charged before each test.

Note3: 100% output was measured 30 seconds from initial turn-on (per ANSI/FL1 guidelines).

 

The highlights of my data are as follows:

HIGH: Within 4 minutes on high (710 lumens), the output drops to 46.7% of initial output (332 lumens).  Within 7 minutes the output drops to 24.7% of initial output (175 lumens).  At 175 lumens, it remained stable for the next 2.5 hours until I ended the test (I had no more time to continue). 

MEDIUM: Within 3 minutes on medium (300 lumens), the output drops to 46.2% (139 lumens).  Within 7 minutes the output drops to 20.8% (62.4 lumens), which remained stable until I ended the test at 15 minutes.

Ouch, the extreme regulation on MEDIUM seems rather needless, as it's regulating at almost the same slope as HIGH. If HIGH can stabilize at 175 lumens, why can't MEDIUM maintain 175 lumens (instead of 62.4 lumens)?

 

Also, going from spot to flood drops the output by about 40%.

 

The light never got hot - only slightly warm around the top of the light. 

 

CONCLUSION (supporting Bort) - I suspect the plastic over steel does not allow much heat to dissipate, which explains the extreme down-regulating.  If there's anything good to say about the extreme down-regulating; the run-time will be much longer.

 

Although Coast is conforming to the ANSI/FL1 standard, 710 lumens is little more than a temporary turbo mode. 

 .

My reviews: , My personal collection of lights LINK,  J5 Tactical V1 Pro review LINK,  Thirteen Optical Sensors review LINKZebralight SC700d review LINK,  Ray-O-Vac Super Power Sportsman review LINK,  Convoy S2+ color combos LINK,  How To flash D4V2 LINK.

Bort
Bort's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 06/01/2012 - 17:15
Posts: 7455
Location: Holding the proverbial flashlight

I was just thinking yesterday that i should destroy the broken light just to see how its assembled since i can’t get it apart. I don’t think its regulated, i think the heat is sagging the output and frying it from the inside out, the plastic head gets warm but if you take the batteries out the tip of the battery holder is almost burning hot.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

Terry Oregon
Terry Oregon's picture
Offline
Last seen: 7 hours 46 min ago
Joined: 10/21/2017 - 17:03
Posts: 486
Location: Beaverton Oregon

Quote:
I was just thinking yesterday that i should destroy the broken light just to see how its assembled

 

Oh pretty please - would love to see pics of that.

My reviews: , My personal collection of lights LINK,  J5 Tactical V1 Pro review LINK,  Thirteen Optical Sensors review LINKZebralight SC700d review LINK,  Ray-O-Vac Super Power Sportsman review LINK,  Convoy S2+ color combos LINK,  How To flash D4V2 LINK.

stephenk
stephenk's picture
Offline
Last seen: 1 month 2 weeks ago
Joined: 01/30/2016 - 05:09
Posts: 1307
Location: Australia

Can I ask what the tint is like?

Terry Oregon
Terry Oregon's picture
Offline
Last seen: 7 hours 46 min ago
Joined: 10/21/2017 - 17:03
Posts: 486
Location: Beaverton Oregon

stephenk wrote:
Can I ask what the tint is like?

 

Definitely on the cold side, slightly more bluish than any other high-end lights I have from Zebralight/Olight/Fenix/Acebeam/Convoy/Jetbeam/Nicore.  I hadn't really thought about it before, but just did a side-by-side comparison with several other lights.

My reviews: , My personal collection of lights LINK,  J5 Tactical V1 Pro review LINK,  Thirteen Optical Sensors review LINKZebralight SC700d review LINK,  Ray-O-Vac Super Power Sportsman review LINK,  Convoy S2+ color combos LINK,  How To flash D4V2 LINK.

Bort
Bort's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 06/01/2012 - 17:15
Posts: 7455
Location: Holding the proverbial flashlight

Terry Oregon wrote:

Quote:
I was just thinking yesterday that i should destroy the broken light just to see how its assembled

 


Oh pretty please – would love to see pics of that.


It won’t be anytime soon, being arctic winter here, but in the spring i might consider it (then i have to figure out how). I have 3 more of these but what i do now is only use maximum for 5 mins, or 10 if really necessary, no more.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

rickw12
Offline
Last seen: 2 months 2 weeks ago
Joined: 02/07/2018 - 13:03
Posts: 163
Location: United States

I’d like to be able to take it apart to get the O-ring out (on the lamp end). It’s so tight, to achieve its waterproof level, that it takes two hands to twist the zoom.

Rick