A florescent reader runs a SHERLOCK test on a research vessel on the San Joaquin River off Antioch, California, U.S., May 25, 2021. Picture taken May 25, 2021. REUTERS/Nathan Frandino

Members of the LGBT community, throw florescent sticks to the the Russian embassy, during a protest for the constant discrimination and violence against the gay community in Chechnya and other regions of Russia, in Mexico City, Mexico April 20, 2017. REUTERS/Carlos Jasso

Chipper Williams and Susan Getzug walk through ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

A tourist poses with ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

A tourist takes a photograph of ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Jon Whinston looks at ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

A boy runs though ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Arlissa Van Hoogen, from Texas, takes photographs of ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Ice formations are seen at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Leander Urmy pauses to take a photo of ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Ice formations are seen at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Mountains are seen in the background of ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Ice formations are seen at the Ice Castles at Silverthorne in Colorado January 3, 2012. The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

Clipper Williams, from Denver, Colorado looks at ice formations at the Ice Castles at Silverthorne in Colorado January 3, 2012.
The Ice Castles at Silverthorne consists of man-made walkways, tunnels, and arches of ice with no supporting structures, some reaching up to a height of 30 to 40 feet (9 to 12 metres). These formations are illuminated at night by 200 compact florescent lights. REUTERS/Nathan W. Armes (UNITED STATES - Tags: SOCIETY TRAVEL)

An Afghan Army soldier wears a florescent safety belt on his helmet as he prepares to go out on patrol with the Canadian Army near the village of Bazaar e Panjwaii, in the Panjwaii district of Kandahar province August 9, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY)

Electrical salesman Dave Ehret of Sydney poses with an old-style incandescent light bulb (R) and a new energy-saving compact florescent bulb (L) at a warehouse in Sydney February 27, 2007. Under an Australian government plan unveiled February 20, 2007, the older light bulbs will be phased out in favour of the more energy-efficient globes which will save money and help reduce the nation's greenhouse gases, reported the Australian Broadcasting Commission (ABC). REUTERS/Will Burgess (AUSTRALIA)`

Electrical salesman Dave Ehret of Sydney poses with an old-style incandescent light bulb (R) and a new energy-saving compact florescent bulb (L) at a warehouse in Sydney February 27, 2007. Under an Australian government plan unveiled February 20, 2007, the older light bulbs will be phased out in favour of the more energy-efficient globes which will save money and help reduce the nation's greenhouse gases, reported the Australian Broadcasting Commission (ABC). REUTERS/Will Burgess (AUSTRALIA)

Indonesian workers install a florescent lamp as part of a trail of a new electric system which includes solar panels in Lam Awe district, on the outskirts of Banda Aceh January 3, 2006. Greenpeace installed solar panels for a new electric system, to replace the old system which was destroyed during last year's Indian Ocean tsunami in Aceh province. REUTERS/Tarmizy Harva

A Thai scientist looks through a florescent microscope to identify influenza virus cells at the World Health Organization (WHO) National Influenza Center in Bangkok on October 21, 2005. Thailand awaited test results on another suspected bird flu case on Friday after a resurgence of the killer virus in Asia, although Indonesian fears the H5N1 strain was mutating eased as a father and son proved negative.

A florescent microscope is used to identify influenza virus cells at the World Health Organization (WHO) National Influenza Center in Bangkok on October 21, 2005. Thailand awaited test results on another suspected bird flu case on Friday after a resurgence of the killer virus in Asia, although Indonesian fears the H5N1 strain was mutating eased as a father and son proved negative.

Influenza virus cells, high-lighted through a florescent microscope, are identified during tests at the World Health Organization (WHO) National Influenza Center in Bangkok on October 21, 2005. Thailand awaited test results on another suspected bird flu case on Friday after a resurgence of the killer virus in Asia, although Indonesian fears the H5N1 strain was mutating eased as a father and son proved negative. REUTERS/Adrees Latif

A Thai scientist looks through a florescent microscope to identify influenza virus cells at the World Health Organization (WHO) National Influenza Center in Bangkok on October 21, 2005. Thailand awaited test results on another suspected bird flu case on Friday after a resurgence of the killer virus in Asia, although Indonesian fears the H5N1 strain was mutating eased as a father and son proved negative. REUTERS/Adrees Latif

A florescent microscope is used to identify influenza virus cells at the World Health Organization (WHO) National Influenza Center in Bangkok on October 21, 2005. Thailand awaited test results on another suspected bird flu case on Friday after a resurgence of the killer virus in Asia, although Indonesian fears the H5N1 strain was mutating eased as a father and son proved negative. HALTH REUTERS/Adrees Latif

Visitors to Sydney's Museum of Contemporary Art look at an exhibit of 400 toaster boxes lit by red florescent lights titled 'On Toast' November 26. The art piece, which has been entered into the Seppelt Contemporary Art Awards, was inspired by the controversial building, nicknamed 'the toaster', being constructed next to the Sydney Opera House.

DG/JO/KM