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bidet glowing blue in the dark

The best bidet with a nightlight: Bidetmega 400 or Bidetmega 150

Find your way in the dark

We’ve all been there—stumbling in the dark trying to find our way through the bathroom in the middle of the night. Maybe you don’t want to turn on the bright light and burn your eyes—maybe you just want to use the toilet quickly and slip quietly back into bed. Luckily, Coway makes incredible, advanced bidet toilet seats equipped with nightlights, which can be turned on and off based on your preference: the Bidetmega 150 and the Bidetmega 400.

Bidetmega toilet seats are thrones with a nightlight

Wired Magazine called the Bidetmega 400 a “night-light-laden throne”:

“Coway’s heated seat, heated water, auto-cleaning, blow-drying, and night-light-laden throne is a masterpiece of comfort and cleanliness I now can’t live without.” - Wired, 2020

It’s no wonder the Bidetmega 400 ranks so highly on so many critics’ lists. Every aspect of the Coway bathroom experience has been slowly developed with research to enhance your comfort and well-being.

Why is the night light blue?

Blue slows down your heart rate and reduces your pulse, which helps you relax your mind and body. Blue helps you relieve the stress of your daily life, and any symptoms of pain, headaches, or insomnia. Blue also highlights any mess around the bowl itself, helping you to maintain the most hygienic toilet possible, inside and out.

Energy cost and longevity

While the light emanating from Bidetmega toilet seats do require electricity, incredibly-efficient LED technology allows light to emanate with very little energy being used. Each light source is the size of a flake of pepper, and uses a fraction of electricity as compared to an incandescent bulb. In addition, you can lower the cost and increase the longevity of the nightlight by turning it off during the day, or at times you know it won’t be in use.

90 days of risk-free* cleanliness

We’re so confident in the comfort of the Bidetmega 400, you can try it out for 90 days* before making your decision. If anything about the bidet toilet seat doesn’t satisfy you, you can return the product for a full refund.

See all Bidetmega models here.

Read more about the features of Bidetmega here.


1Coway air purifiers have been proven to trap dust, pollen, dander, viruses and bacteria in the air based on KCL (Korea Conformity Laboratories) testing.They have been tested in a 30㎥ size chamber according to the Korea Air Cleaning Association standard (SPS-KACA 002-132:2022 Modified) to measure the 0.01㎛ size of particle removal rate. It was tested on maximum airflow speed in normal room temperature and humidity conditions. The performance may vary in the actual living environment of customers.
→ Tested with Airmega Aim, 100, 150, 160, AP-1216L, AP-1512HH, AP-1512HHS, 200M, Icon, IconS, 230, 240, 250, 250 Art, 250S, 300, 300S, 400, 400S, ProX

299.97% of viruses, bacteria, fungi and pollen were verified to be removed from the air for Coway air purifiers which have Green True HEPA™ filter applied based on the Japan Food Research Laboratories(JFRL) testing according to JEM 1467 standard.
→ Tested with Coway Airmega AP-1512HH, AP-1512HHS, 250, 250 Art, 250S, 300, 300S, 400, 400S
→ All tested by JFRL and received above result within below time.

All tested by JFRL and received above result within below time.

- Virus: Tested with Escherichia coli phage ΦX174 NBRC 103405, 60 minutes
- Bacteria: Tested with Staphylococcus epidermidis NBRC 12993, 60 minutes
- Fungi/Mold: Tested with Penicillium citrinum NBRC 6352, 60 minutes
- Pollen: Tested with Cedar Pollen extract, 60 minutes

3Aerosol test conducted in a Biosafety level 3 laboratory with two Coway air purifier models, Coway Airmega 250 and 400 for removal of SARS-CoV-2 Aerosol by US based MRI Global, a not-for-profit laboratory and partner of US Department of Defense. The test was conducted in a 13.1ft3 chamber. Virus was aerosolized for 15 minutes and the product was turned on high for 2 minutes. Result showed each product effectively removed over 99.98% of the SARS-CoV-2 in 2 minutes. This is a result from a laboratory experiment condition and result may vary in different conditions. This result does not imply it kills SARS-CoV-2 or prevents the transmission of Covid-19. Coway Airmega 250S and 400S are identical to the tested models and has equal performance with an additional mobile connectivity function.

4The concentration of ammonia, acetaldehyde and acetic acid were proven to be removed within 30 minutes by FCG Research Institute, Inc. Human Life Science Lab. It is not a demonstration result in the actual use space. Not all odors and gases may be supported. → Tested with Coway Airmega 150, 160, AP-1512HH, AP-1512HHS, 400, 400S

5The coverage area of the air purifier is based on an area where the air cleaner can make two air changes per hour (ACPH). An air change per hour translates to how many times an air purifier can clean an area, assuming the height of a ceiling to be 8 ft, in one hour. Therefore ** means two air changes per hour means that the cleaner can clean the area once every 30 minutes and * means air changes per hour means that the air purifier can clean the area once every 60 minutes.

10Terms and conditions apply. Discounts, including promotions, coupons, bundle discount and subscription discount, cannot be stacked on top of other coupons. During promotional periods, discount codes will not be able to be applied to orders. Promo codes may apply to products only—filters, accessories, and new products within 3 months of the release date are not included.