# Which digital times produce the most light on clock radio? **URL:** \ **Category:** Factual Questions\ **Created:** [December 14, 2006, 3:16am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067 "2006-12-14T03:16:47Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Thumper\_Stauss](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/thumper_stauss/32/7562_2.png) [@Thumper\_Stauss](https://boards.straightdope.com/u/Thumper_Stauss)\ **Post date:** [December 14, 2006, 3:16am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/1 "2006-12-14T03:16:47Z")
My friend think 10:08 is the all-time brightness champion. Does this seem correct to you? ---
**Author:** ![Shagnasty](https://avatars.discourse-cdn.com/v4/letter/s/9dc877/32.png) [@Shagnasty](https://boards.straightdope.com/u/Shagnasty)\ **Post date:** [December 14, 2006, 3:23am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/2 "2006-12-14T03:23:31Z")
I just looked at the number of lines needed to produce each number on my clock and the valid times and your friend appears to be correct. However, “all time champion” status usually implies some type of unlimited contest. Tell your friend that he is full of it. 21:08 easily beats it on a military time digital clock (also in use in many countries as the standard format). > **[LED Small Digital Desk Clock with Seconds : Electronics USA](https://electronicsusa.com/ck1.html)** > > CK-1 LED small Digital Desk Clock with seconds (six digits) and 12 or 24 hour time. A quality miltary clock, Zulu clock, etc... 5 Year Warranty. USA Assembled. ---
**Author:** ![Squink](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@Squink](https://boards.straightdope.com/u/Squink)\ **Post date:** [December 14, 2006, 3:24am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/3 "2006-12-14T03:24:09Z")
[QUOTE=Thumper Stauss] Does this seem correct to you? [/QUOTE] Yes, excepting the 88:88 of an unset clock. ---
**Author:** ![susan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/susan/32/17537_2.png) [@susan](https://boards.straightdope.com/u/susan)\ **Post date:** [December 14, 2006, 3:28am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/4 "2006-12-14T03:28:54Z")
PM, with the alarm on, for those two dots. ---
**Author:** ![lazybratsche](https://avatars.discourse-cdn.com/v4/letter/l/ba8739/32.png) [@lazybratsche](https://boards.straightdope.com/u/lazybratsche)\ **Post date:** [December 14, 2006, 3:31am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/5 "2006-12-14T03:31:39Z")
[QUOTE=Shagnasty] 21:08 easily beats it on a military time digital clock (also in use in many countries as the standard format). [/QUOTE] How about 22:08? 😛 ---
**Author:** ![Scarlett67](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/scarlett67/32/7387_2.png) [@Scarlett67](https://boards.straightdope.com/u/Scarlett67)\ **Post date:** [December 14, 2006, 3:35am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/6 "2006-12-14T03:35:53Z")
[QUOTE=Shagnasty] 21:08 easily beats it on a military time digital clock (also in use in many countries as the standard format). [/QUOTE] Don’t know about that; 10:08 uses 21 segments, and 21:08 uses 20. 23:08, the apparent max, uses 23 segments. I was counting these up quickly; can anyone correct or beat these? ---
**Author:** ![susan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/susan/32/17537_2.png) [@susan](https://boards.straightdope.com/u/susan)\ **Post date:** [December 14, 2006, 3:45am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/7 "2006-12-14T03:45:33Z")
Yes, 23 segments. Plus colon , plus two dots (as described above), plus the icon that indicates the radio alarm setting. ---
**Author:** ![pulykamell](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pulykamell/32/3166_2.png) [@pulykamell](https://boards.straightdope.com/u/pulykamell)\ **Post date:** [December 14, 2006, 3:57am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/8 "2006-12-14T03:57:03Z")
[QUOTE=Scarlett67] Don’t know about that; 10:08 uses 21 segments, and 21:08 uses 20. 23:08, the apparent max, uses 23 segments. I was counting these up quickly; can anyone correct or beat these? [/QUOTE] 20:08 - 24 segments ---
**Author:** ![susan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/susan/32/17537_2.png) [@susan](https://boards.straightdope.com/u/susan)\ **Post date:** [December 14, 2006, 4:04am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/9 "2006-12-14T04:04:05Z")
00:08 - 25 segments ---
**Author:** ![Amp](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@Amp](https://boards.straightdope.com/u/Amp)\ **Post date:** [December 14, 2006, 4:11am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/10 "2006-12-14T04:11:28Z")
08:08 - 26 Segments ---
**Author:** ![pulykamell](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pulykamell/32/3166_2.png) [@pulykamell](https://boards.straightdope.com/u/pulykamell)\ **Post date:** [December 14, 2006, 4:41am UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/11 "2006-12-14T04:41:27Z")
[QUOTE=Shoshana] 00:08 - 25 segments [/QUOTE] I thought about that one and 08:08, too, but didn’t list it because I thought my clocks display 0:08 and 8:08, respectively. Now that I checked, it seems they do use all four digits. ---
**Author:** ![Bippy\_the\_Beardless](https://avatars.discourse-cdn.com/v4/letter/b/ac8455/32.png) [@Bippy\_the\_Beardless](https://boards.straightdope.com/u/Bippy_the_Beardless)\ **Post date:** [December 14, 2006, 5:27pm UTC](https://boards.straightdope.com/t/which-digital-times-produce-the-most-light-on-clock-radio/384067/12 "2006-12-14T17:27:18Z")
What about a clock with a seconds display 😉 08:08:08