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  2. Are airline credit cards worth it? Yes, but there’s one big ...

    www.aol.com/finance/airline-credit-cards-worth...

    The exact same flight priced out at 15,000 miles using Flying Blue. ... As with almost everything about credit cards, the answer to whether airline cards are worth it isn’t quite black and white ...

  3. JetBlue’s $499 gamble: A new travel credit card that ... - AOL

    www.aol.com/finance/jetblue-499-gamble-travel...

    The $499 annual fee is steep compared to other premium travel cards, like the Capital One Venture X Rewards Credit Card, that offer broader benefits across various airlines and hotel programs.

  4. Are blue light glasses really worth it? A new analysis says ...

    www.aol.com/finance/blue-light-glasses-really...

    However, a key limitation is the duration of the trials, with assessment between one day to five weeks after wearing either the blue light or non-blue light glasses. The sample sizes also ranged ...

  5. Biological effects of high-energy visible light - Wikipedia

    en.wikipedia.org/wiki/Biological_effects_of_high...

    Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.

  6. Blue light spectrum - Wikipedia

    en.wikipedia.org/wiki/Blue_light_spectrum

    It emits more blue light than traditional incandescent bulbs, potentially impacting the quality of sleep and eye health if used excessively at night. [2] [8] A person using a smartphone at night. Blue light is emitted by digital screens such as computers, tablets, smartphones, and televisions, which can lead to extended exposure in modern lives ...

  7. Delta is offering huge SkyMiles bonuses for new cardholders ...

    www.aol.com/finance/delta-offering-huge-skymiles...

    The Gold card's jump from 50,000 to 80,000 miles for just $1,000 more in spending is particularly attractive, especially for those who can easily meet the spend requirement.

  8. Blue Light - Wikipedia

    en.wikipedia.org/wiki/Blue_Light

    Blue light phototherapy, light therapy involving a medical device that radiates blue light; Cobalt blue light, a type of light used by slit lamps to help in the diagnosis of eye diseases; Effects of blue light technology; Blue Lanterns (disambiguation) Bluelight (disambiguation)

  9. Is the Delta SkyMiles Gold American Express Card worth it?

    www.aol.com/finance/delta-skymiles-gold-american...

    Note, however, that the Delta SkyMiles Blue American Express Card doesn’t have some of the co-branded card benefits like free checked bags. It also offers a lower earning rate on purchases, and ...