Needs a couple of o-rings for mounting
928431
This light is a great value.  The old TRILED I had died so I got this to replace it.  It's smaller, lighter, and seems brighter.  It has 3 AAA batteries, as opposed to the 3 AA in the TRILED.  The TRILED had a rubbery coating that, over time in the ridiculous Texas sun gets reduced to a sticky mess.  This light has a hard plastic shell.  I anticipate no such problems with this light.  This light has a solid and strobe mode.  Super lightweight.  It was tough to mount, but only because there was only one size of o-ring supplied.  I had to wrench my fingers to get it on.  Sigma also supplies zip ties to fit any bars, but I like the clean look of the o-ring so I made it work.  Would have liked a couple of o-rings.  That is a small criticism though.  I love this light.  I am always happy with Sigma products.
839579
Good mounting hardware. Cable length needs to be about 1 foot longer to reach more areas in the dashboard for mounting
33320
I had a follow-up from  Heezy LLC, the manufacturer of this flanged inlet mount. Impressed that they included an additional .pdf electrical/engineering diagram of this product and took the time to clarify the need for a 2 1/4" sized hole for mounting purposes.  FYI, I am using this weatherproof plate to cover our 4.5x4.5 electrical box:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Hubbell-Bell-MX2150S-Two-Gang-One-Device-Flat-Metal-Weatherproof-Receptacle-Cover-Grey/dp/B003OBXXKG/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Hubbell-Bell MX2150S Two Gang One Device Flat Metal Weatherproof Receptacle Cover, Grey</a>
4048088
Works well, but I should have thought a bit more about the placement and the lack of ability this has versus a gimble or pivot type mount.
1235258
Will need a thumb screw for mounting as it did not ship with one.  For the price it should have.
2796621
Disappointed that Two Blue rubber O_Rings supplied for the outer housing groove, but, missing an black (smaller) O-Ring for the inner groove.
3519287
Had to enlarge two of the slots on the mounting bracket with a dremel. With the way my junction box screws were positioned, the light fixture could not be level without this modification. Wiring is slightly too long and I had to really work to squeeze it all in the box.
4450395
Mounting system is Mickey Mouse. To get it tight enough you have to torque it down until it deforms. Can tell its not gonna last.
3084129
Mounting bracket you have to attach yourself and the little metal pieces that bend to keep the back in kept falling off
2730919
Too large to mount two of these on a standard exterior base - but you need two in order to replicate the lumens from a halogen light.  Use of a 4" American standard extension solves the problem.  If this is not included, it should at least be noted in the product description that it will be needed if it is to be dual mounted.  The wires on one of the units I bought were shorter than on the others, requiring splicing in order to install with an extension - but the others were fine.  The light itself works fine and appears to produce the lumen level advertised so I am not unhappy with them, just disappointed with the poor description and short wires received on 1 of 4 units.
161739
Get one from your hardware store - #83 O-ring...1/2 inch outside diameter, 5/16 inside diameter, 1/4 inch thick
$2.67 for 10
Fits well, works well....problem solved.
2911841
had to modify for my application, plate pops up a bit due to the mounting screws under the plate, but quality metal
4533897
Great fit, but very difficult to mount. I ended-up having to go and hunt down some specialty hardware so I could securely mount the units. Required that I jack my vehicle up to gain access. Don't forget to use jack stands! If you can afford it, pay a professional installer to do the work.
2639642
Don't get these if you don't have the capability of drilling steel.
The are a custom design that most equipment won't match.
I got them being aware that this would probably be the case.
They are a fine way to rack mount a 1U enclosure if you don't want to pay for (or can't find) the manufacturer's own rack ears.
Use the holes provided and drill your enclosure, or drill out the rack ear to match your enclosure. The screws that come with it are a metric size that IS very common in rack-mountable networking equipment.
1688385
I like them but I may modify the mounting to move them down and in a little bit, nice fit and finish
1265865
Works reasonably well. Should have a better way to mount, included two sided tape or magnet severely lacking. I ended up drilling two small holes in lower "tab" and using small screws.
1756095
I wound up combining these brackets with some "random taillights" from my collection to solve a couple of problems and have found them to be quite useful--  one of them is sporting a Trek labeled LED and the other is fitted up with an [asin:B008KEOICE] which is a favorite light with an unfortunate mounting clip.

In both cases the shims/brackets allowed a secure mount to the seatstay --- necessitated by a small frame and an under-seat bag on a couple of our bikes.

Visibility - just do it.

- J