All down: When farm commodities are uniformly depressed, that's a warning light flashing.
The red Fire Warning light is bad news when it lights up, but you can silence the alarm bell by pressing it.
And under International Civil Aviation Organisation regulations, any structure over 45 metres tall on a flight path or near an aerodrome must be fitted with a medium-intensity aircraft warning light.
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Economists would say the rising prices are like the check engine light coming on on the dashboard, and to lift the gas tax would just put a piece of black tape over the warning light.
"For now the warning light is orange but it risks turning red if the appropriate measures are not taken, " he said, recommending a national conference of all political parties to forge a common anti-terrorism strategy.
"I think it is just another giant, flashing warning light to bitcoin exchanges: If you're not compliant, there are some serious risks, both at the federal and state levels, " said Patrick Murck, legal counsel for the Bitcoin Foundation, a trade group that promotes bitcoin software and security standards.
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In less-severe cases, warning lamps could light up and vehicles may go into fail-safe driving mode with reduced power.
We loved a feature where the rear view mirrors displayed a little orange light, warning us when an object was in our blind spot.
Last month the Commons Education Select Committee issued a damning report into the plans, which it described as a "red light" warning over the changes.
Last week a report from the Commons Education Select Committee issued a "red light" warning to the government, urging it to slow down and rethink its proposed changes to GCSEs and the exam system.
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It said it wanted a "traffic light" warning system for drugs - with green for those safe to take and drive, amber for caution and red signalling severe adverse effects which would dangerously impair driving.
But consider what happens when the power goes out -- when, without warning, we lose artificial light.
It remains true that the U.S. economic recovery is tepid, that hefty expectations are built into many of the stocks that have started 2013 the strongest and that a pickup in equity mutual fund inflows could be just as much a warning sign as a green light.
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He called for an education campaign warning people of the risks of UV light and said there was a need to look at the access to salons and the regulation and use of the sunbeds.
Unfortunately, they seem to be a necessary evil in this crazy supply-versus-demand world of capitalism we all call home, particularly in light of the spectrum crunch the FCC keeps warning us about.
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Start Point's light beams 25 nautical miles out to sea, warning ships away from treacherous Skerries Bank.
President Obama even made a light-hearted reference to Mr Netanyahu's warning of a "red line" with Iran's nuclear programme.
It would prohibit tobacco companies from using terms such as "low tar, " "light" or "mild, " require larger warning labels on packages, and restrict advertising of tobacco products.
About seven hours later emergency services gave the green light for residents to go home, with the warning "smoke is likely to continue for the next few hours".
The maker of light emitting diodes, or LED, drivers, issued a second-quarter warning, lowering its revenue projection.
Hamilton said he had been told by the team that the red light was on at the end of the pit lane, but that the warning came "a little bit late".
For example, I emailed the company several weeks ago asking why it was still doing business with Light Impressions, a supplier of archival framing and storage materials which has a consumer warning from the Better Business Bureau and is the subject of multiple complaints on various photography Web sites.
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