Sleep environment basics: light, sound and temperature gear

• Blackout: blinds and sleep masks. Compare fit, weight and how much light gets in at the edges.
• Evening light: amber or low-blue bulbs and glasses. Compare the colour temperature (K) and the stated blue-blocking range in nm.
• Sound: white-noise machines and sleep earbuds. Compare noise options, battery life and comfort for side sleepers.
• Temperature: cooling mattress pads and breathable bedding. Compare power draw, noise and running cost.

These are comfort and environment products. We describe features only and make no claims about health outcomes.