In September 2003, a new type of blue LED was demonstrated by Cree that consumes 24 mW at 20 milliamperes (mA). This produced a commercially packaged white light giving 65 lm/W at 20 mA, becoming the brightest white LED commercially available at the time, and more than four times as efficient as standard incandescents. In 2006, they demonstrated a prototype with a record white LED luminous efficacy of 131 lm/W at 20 mA. Nichia Corporation has developed a white LED with luminous efficacy of 150 lm/W at a forward current of 20 mA. Cree's XLamp XM-L LEDs, commercially available in 2011, produce 100 lm/W at their full power of 10 W, and up to 160 lm/W at around 2 W input power. In 2012, Cree announced a white LED giving 254 lm/W, and 303 lm/W in March 2014. Practical general lighting needs high-power LEDs, of one watt or more. Typical operating currents for such devices begin at 350 mA.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the typical operating current for low-power LEDs?
Ah, so.. unanswerable

The Mark 1 in turn quickly became the prototype for the Ferranti Mark 1, the world's first commercially available general-purpose computer. Built by Ferranti, it was delivered to the University of Manchester in February 1951. At least seven of these later machines were delivered between 1953 and 1957, one of them to Shell labs in Amsterdam. In October 1947, the directors of British catering company J. Lyons & Company decided to take an active role in promoting the commercial development of computers. The LEO I computer became operational in April 1951 and ran the world's first regular routine office computer job.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When was the Ferranti Mark 1 built?
Ah, so.. 1951

Although Tristan da Cunha shares the +290 code with St Helena, residents have access to the Foreign and Commonwealth Office Telecommunications Network, provided by Global Crossing. This uses a London 020 numbering range, meaning that numbers are accessed via the UK telephone numbering plan. From 1998 to 2006, internet was available in Tristan da Cunha but its high cost made it almost unaffordable for the local population, who primarily used it only to send email. The connection was also extremely unreliable, connecting through a 64 kbit/s satellite phone connection provided by Inmarsat. From 2006, a very-small-aperture terminal provides 3072 kbit/s of publicly accessible bandwidth via an internet cafe.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who does Tristan Da Cunha share Global Crossing codes with?
Ah, so..
unanswerable