However, the uneven spectrum of traditional fluorescent lamps may cause certain colors to appear different than when illuminated by incandescent light or daylight.

However, the Edison alkaline battery proved useful for lighting railway cars and signals, maritime buoys, and miners lamps.

However, from 2007 onwards, the halogen lamps were replaced with LED lights.

However, some lamps ( mainly fluorescent tubes / energy saving lamps ) can be restruck as soon as they are turned off ( called hot restrike lamps ).

However, UVB heat lamps have not been proven to have the same quality as direct, unfiltered UV rays from the sun.

However, when ramp metering is about to be enabled, the overhead lamps may show flashing or solid yellow to warn drivers to prepare to stop.

However, in October, a proposal was written to turn them all into electric lamps, but the proposal was denied.

However, another oil-lamp of the same kind, showing the sixty-nine almost identically … is more recently reproduced as a full-color plate, in Prof. Jean Marcadé ’ s Eros Kalos ( English-language edition, Geneva: Nagel, 1965 ), facing page 58, in … lamps preserved in the Heracleion Museum in Greece.

However, CCFLs are strictly limited in the degree to which they can be dimmed, both because a lower plasma current will lower the temperature of the cathode, causing erratic operation, and because running the cathode at too low a temperature drastically shortens the life of the lamps.

However, funding for the move was not available, and in 1980 San Jose began a program to reduce the effects of lighting, most notably replacing all streetlamps with low pressure sodium lamps.

However also LEDs, SLEDs or lamps play an important role.

However, these lamps suffer from higher purchase cost, shorter life, and lower light efficiency.

However, the modification must be done professionally as the high voltages that power these lamps can be lethal.

However, when scotopic / photopic light calculations are used, it can be seen how inappropriate HPS lamps are for night lighting.

However, the high cost of natural gas lighting at least partly explains why a large number of older gas lamps have been converted to electricity.

However, mercury vapor lamps are falling out of favor and being replaced by sodium vapor and metal halide lamps.

However, it is more important to determine the type of lamps and fittings needed to create the desired effects.

However, high-frequency operation does not increase lamp efficacy as for fluorescent lamps.

However, as both the incandescent lamps and the orange signage were replaced with the more conventional fluorescent white tubes, these red tones disappeared.

However, it has been under the aegis of Liberal ( later Liberal Democrat ) Sir Alan Beith since 1973, and previously the area has been notable for its liberal leanings – both Sir William Beveridge ( influential in the formation of the National Health Service ) and Edward Grey ( Foreign Secretary at the start of World War I, best remembered for the " lamps are going out all over Europe ...." remark ) have served this constituency.

However, a shorter phototherapy recovery period was noticed in babies exposed to the green lamps ( 1 ).

However, that particular case is a theorem of Zermelo – Fraenkel set theory without the axiom of choice ( ZF ); it is easily proved by mathematical induction.

However, in practice they proved to be too large to manoeuvre well in the close waters of estuaries and rivers, the only places in which a ' naval ' battle could occur.

However, shortly after this positive result, Kurt Gödel published On Formally Undecidable Propositions of Principia Mathematica and Related Systems ( 1931 ), showing that in any sufficiently strong axiomatic system there are true statements which cannot be proved in the system.

However, this design proved to be very difficult to remove from the console and was replaced by a second design.

However, chlorpromazine proved to reduce the effects of psychosis in a more effective and specific manner than lobotomy, even though it was known to be capable of causing severe sedation.

" However, his looks proved to be an asset in his personal and political relationships, as his law partner William Herndon wrote, " He was not a pretty man by any means, nor was he an ugly one ; he was a homely man, careless of his looks, plain-looking and plain-acting.

However, it was ultimately unable to achieve a significant market share and proved commercially unviable for Be Inc.

However, subscription-funded digital terrestrial television ( DTT ) proved less of a competitive threat.

However the rope available at the time proved too susceptible to wear and the system was abandoned in favour of steam locomotives after eight years.

However, the PDP-6 proved to be a " hard sell " with customers, as it offered few advantages over similar machines from the better established vendors like IBM or Honeywell, in spite of its low cost around $ 300, 000.

However, the plantations, both under their previous private ownership and under government administration, proved consistently unprofitable due to the introduction of new oils and lubricants in the international marketplace, and the establishment of vast coconut plantations in the East Indies and the Philippines.

However, Thomas Crow argues that this path " proved to be less a way forward than a cul-de-sac for history painting.

However, when Baden was transferred west to fight the French in 1692 his successors, first Caprara, then from 1696, Frederick Augustus, the Elector of Saxony, proved incapable of delivering the final blow.

However, the facilities proved to be able to barely handle the flood of immigrants that arrived in the years just before World War I.

However, General Niazi proved to be a failure and ineffective ruler.

" However the Times also reflected widespread skepticism as to whether the forward pass could be effectively integrated into the game: " There has been no team that has proved that the forward pass is anything but a doubtful, dangerous play to be used only in the last extremity.

However, according to the late Tomoyuki Tanaka, it proved to be difficult to obtain permission to use King Kong.

However the Eastern Question and the resulting Crimean War proved to be the downfall of his government.

However, the rise of quiz shows proved to be short-lived.

However, a campaign to reconquer Peru and Chile during the Chincha Islands War ( 1864 – 1866 ) proved disastrous and Spain suffered defeat before the determined South American powers.

However, Paul Henreid proved to be the best player.

However, his discoveries were not appreciated by his contemporaries and came into general use only with discoveries of British surgeon Joseph Lister, who in 1865 proved the principles of antisepsis in the treatment of wounds ; However, medical conservatism on new breakthroughs in pre-existing science prevented them from being generally well received during the 19th century.

However, his captaincy proved to be an unhappy one ; he lost form and the team did not do well.