Are these good for 20' distances?
321803
These could very well work for that. This comes with a 150W flood bulb that will provide a lot of light coverage at that distance at a decent brightness. These lights are usually used in multiple sets to make more light or have colors in front of each to provide color effects on the same area. If you were unhappy with how wide it is, and you would not like to move it, try going to Home Depot in looking for a halogen Par38 bulb that is 90W and a spot, not a flood, coverage. This will give you a much narrower beam and more brightness at that distance in a much smaller area (less overall light, but more of it in a smaller place). Ultimately, the black metal part is just a bulb holder and a cord set to plug it in, and all of the lighting brightness and how narrow or wide it is is dependent on the bulb, which can be easily swapped out since it uses a standard size lightbulb thread. Just like buying a room lamp at a store, how the light acts is all about the bulb. The casing on this bulb is black and has a gel frame spot to suggest more of a usage for performance and entertainment. But at this price, it doesn't hurt to try one and see what you think. I happen to use these at one of the performance space I oversee. They use a set of 8 of these units, with the 90W bulbs that are spots, with 4 on either side of the room pointed across the stage evenly - the throw distance being 15-25'. They are hooked up to a dimmer panel for entertainment that can be controlled by an entertainment lighting console. This is a very cheap option to get started and go from here.
321804
Somewhat. You'd need several of them to really light the area well at that distance. I use them in conjunction with a follow up, which you can get between $250 - $500.
2172656
Not really. They are of poor quality , light weigh. You would be well advised to go to something different.
1236885
I'm sorry. I do not know, as these were purchased as a gift. I would say around 15/20 ft.
61533
I didn't go any deeper than 20 to 25 feet below the surface but at that depth they worked just fine. There were no indications of any problems at all.
1603773
I have used them outside....I would say no more than 10 feet on the range....we mainly use them inside
52289
These worked really well for me. I was putting in long miles - 10-20 mile runs, and never had any problems!
294439
It depends on the environment. It has worked fine 50' away but not always. 20' to 30' seems pretty dependable.
370695
30 feet is what is stated in the manual. I have no trouble at 20 feet, but haven't had any reason to go further to date.
175523
I don't know. I have used them several times and they worked well. I'm 1500 miles away from them now.
1608795
They are good quality. 20 years? I have had them for 2 years now and they seem to be doing ok. However I cannot assess whether they will last 20 years. If you are looking for a good long term investment in your audio setup it may be better to look for options that explicitly guarantee long term duration, as this ones don't say anything about that. In my opinion, if these babies give you 5+ years, it was already a good investment, as I love the sound they have.
1799827
Just tried the distance and mine seems to work quite well at 20+ feet. Mind you USB receiver is in the front clear view.
1260851
I have the antenna at 20 feet above ground and it gets some channel with very good reception, so I would say anything over 20 feet and point at the right direction.
166846
These would be great for up close. Throw a very wide beam. However the range is probably 100-150 feet. If you are a crawler they would work be great nothing in that range would be out of sight. If you want some distance they make Spotlight versions of these. I have some of the round ones and they shine a good ways down the road. I put them on my 4 wheeler.
505980
You must have a clear line of sight for the units to work well. Your distance is much shorter then the units are capable of reaching, so they might work if the trees are not dense, but if the trees are thick and dense if most like will not be successful. I am using a pair at 1,500 ft. with a clear line of sight UNDER some trees and they work amazingly well.
612584
Definitely 20 feet because you will pay a bunch more for 25 feet.20 feet should be plenty to connect two cars, or two trucks, together at the batteries.
1903536
I purchased mutilple cables as I need to go a 17 foot distance. They connect together using the supplied 4 pin connectors that come with the cable. I didn't find any cables longer than 15 foot that is why I purchased 2. So yes these will work for you hope this helps.
1497885
20-25 feet...I really don't go further than that, but the calls are clear from this range.