Very bright and clear. I live out in rural ...
925598
Very bright and clear. I live out in rural area and I have 11 acre, when I turn these led flood lights on i can see clearly within 15 yards.  Be careful my neighbor complained that it was pointing directly at her and it was disturbing her eye sight who lives 60 yards from my house.
72544
These are extremely bright and non-directional.  I had to replace a set I previously ordered that had a lens at the end.  My vehicle is a '95 Jeep Wrangler, and the bulb is positioned on a 45 degree angle.  That works for a filament bulb, but not one with a lens.
I'm very happy with these.  Not only do I have more light at night when reversing, but they are more noticeable when backing up in a parking lot.  I always worry about people walking in back of me in those situations.
2844606
This is really bright!  And true to the description it is a warm white color, not like the fluorescent bright white.  I have the solar panel in a place where it gets the mid-day and afternoon sun so it has lots of charge.  The spikes are plastic - wish they were metal but so far they're fine.  I did take the advice of another reviewer and before I even used it, I sealed the edges of the light with clear caulk to waterproof the seal.  When it rains, water does collect in the lip of the light because I have mine pointed upwards into my tree, but water has not penetrated the light.  Since the capacity of the battery is pretty large relatively speaking, the light lasts throughout the night.  (I only see it till about 11pm /midnight when i go to sleep).  When I wake up the light is off but it is sunny outside so i don't know what time it really dies during the night when the charge is depleted.

Make sure you have the solar panel in a spot that gets direct sunlight for the best results.
229442
Just got these in and installed today. They are Extremely bright. I'm very satisfied with performance and quality. I'll update in a couple months if they get moisture in them like some have said. I was looking for some good flood lights I could use for both jobsite and back roads. These will do great. Definitely not fog lights cause they have such a wide cone pattern it would blind driver with reflection. Took a couple photos parked you can see what I mean how it lights up the tree next to me. I wouldn't use them with any kind of traffic oncoming or if I'm following anyone they'd be too blinding.  I'll take more photos later (in landscape this time) when I hit the rural back roads.
172208
Bought 3 of these months ago for outside use.  They are near the ground, pointing up at parts of the house.  Bright, takes very little electricity, all 3 working just fine.  I wish they were a bit cheaper, but I'd say very worthwhile.
2272400
I am very happy with my purchase so far.  The light is very bright while driving down the road, but I have not tried using it on a very dark trail yet.  That will be the real test to see if it put the light where I want it.
I mounted this on the hood of my Jeep Wrangler TJ using the Rough Country hood mounts for a 20" LED.  I had to add 6-8 washers between the light and the brackets in order to keep it stationary, but that is not an issue. I have not had any issues with water intrusion as others have noted (I live in Hawaii, and it rains here all the time).
2540755
Very bright and works great now I don't have to worry about turning on light outside on the trees.
3277227
Clear and bright.  Works well.  Only issue is I would have liked more battery life.
993999
This works well for me but I am in an urban area so my experience does not apply to rural installations.
499528
I really love this taillight because it is extremely bright and clear. It has a very professional and computerized LED light sequence and only uses 2 AA batteries. It can also be seen during the daytime. It has three different settings that drivers can see from very far away and is attention getting but not a distraction to drivers...It seems to fit in very well with the flow of traffic and it does a good job of controlling and allowing drivers to avoid you while riding a bicycle on the road.
2200309
I have several of these outside and find them to be Bright and the sensor to be very sensitive at many angles including 20' away at about a 10' height.  I have had them in use for about a year and they are still very bright with no degrading of the plastic.  The lEDs are the type on cell phone flashers.....very bright and small.  I thought they were a bit expensive when I ordered them, but am very happy and will get more for my deck stairs.
1936816
Clear and bright.  For my old (66 yr old) eyes, the reticle is not visible in really low light without illumination, and with the illumination, even on the lowest setting, washes out what I'm trying to see.
576963
I replacement my headlights in my truck about a month ago. I didn't want those super bright ones that blind you because I go to the mountains quite a bit and drive on dark windy roads .. i need a strong bright light and these really work well.
2637357
very bright; useful for many indoor and outdoor projects
10776
Amazingly clear and bright output in my outback. I have to replace them once a year, but thats to be expected if you read the packaging which clearly states that they only last half the life of a regular halogen bulb.***UPDATE*** It's been 18 month's and I am just now having to replace these which is better than the 10 -12 months of life I was experiencing in the past. They are so bright I didn't even realize I had a headlight out until I pulled right up to my garage door one evening. For the increase in clarity it is worth going through the trouble of changing out the bulbs.
3806623
this light here bright as hell! i went outside and my neighbors stay wayyyyy down the street. i can see their house clearly
4692656
This is wonderful.  I live in my van and this lights up the area just fine.  Not bright like a light bulb but solar doesn't seem to ever be that bright.  I have friends who have these and some of them have had problems with the little on off switch wearing out or the strap breaking but so far mine is working great.  Because I live in the van I didn't blow it up completely because I am sometimes in very hot or very cold weather.  I am sure the changes in altitude would cause problems too if it was blown up to tight.