How to Choose a Waterproof Flashlight for the Rainy Season and Power Outages | IPX Waterproof and Long-Lasting Models Compared
Aiden TsangShare
Why You Need a Flashlight During the Rainy Season
Japan's rainy season, from June to July, brings an increased risk of heavy rain, floods, and power outages. According to the Cabinet Office's disaster prevention information, the number one essential item for power outages is a "flashlight." However, stories of "dead batteries," "getting wet due to lack of waterproofing," or "insufficient light" in crucial moments are all too common.
When choosing a flashlight for the rainy season, be sure to check these three points: waterproof rating, lumen output, and charging method.
Understanding the Differences in Waterproof Ratings (IPX)
Flashlight waterproof performance is indicated by the "IPX" rating. A higher number means better waterproof performance; for rainy season and outdoor use, we recommend at least IPX6 or higher.
| IPX Rating | Waterproof Level | Expected Scenario | Rainy Season Suitability |
|---|---|---|---|
| IPX4 | Splash-proof | Light rain, indoors | △ Insufficient |
| IPX5 | Jet-proof | Heavy rain, washing | ○ Minimum |
| IPX6 | Water pressure resistance | Heavy rain, outdoor work | ✅ Recommended |
| IPX7 | Submersible for 30 min | Submersion, flood risk | ✅✅ Optimal |
| IPX8 | Submersible 1m+ | Underwater, flood | ✅✅✅ Strongest |
Estimated Lumen Output Needed for Rainy Season and Power Outages
| Purpose | Recommended Lumens | Example |
|---|---|---|
| Indoors, reading | 100-300lm | Indoor lighting during power outage |
| Outdoor travel, evacuation | 500-1000lm | Checking evacuation routes at night |
| Wide area illumination, work | 1000lm+ | Outdoor work, search and rescue |
| Ultra-bright, emergency signal | 3000lm+ | Long-distance illumination, rescue signal |
Comparison of Charging Methods: Dry Cell vs. Type-C Charging
When choosing a flashlight for the rainy season or power outages, the charging method is often overlooked. While dry-cell flashlights can be used as long as you have batteries, Type-C rechargeable flashlights can also be charged from a mobile battery, making them suitable for modern disaster preparedness scenarios.
| Charging Method | Pros | Cons | Recommended Scenario |
|---|---|---|---|
| Dry Cell | Immediately usable with batteries | High running cost, environmental impact | Long-term storage, emergency use |
| Type-C Rechargeable | Mobile battery compatible, economical | Requires power source when battery is dead | Everyday use, outdoor activities |
| Solar Rechargeable | No external power needed | Slow charging, weather-dependent | Long-term outdoor activities |
For rainy season and power outage preparedness, the combination of Type-C rechargeable + mobile battery backup offers the best cost-performance.
Aestiquo's 2 Recommended Waterproof Flashlights
Specs: IPX6 waterproof / 6 lighting modes / Type-C charging / Zoomable / Impact resistant 3M
Specs: Military grade / XHP160 chip / COB work light / Type-C charging / Impact resistant 3M
See our full flashlight lineup in the Flashlight Collection.
Rainy Season & Power Outage Preparedness Checklist
- ✅ Have at least one IPX6 or higher waterproof flashlight.
- ✅ If using Type-C rechargeable, also stock a mobile battery.
- ✅ Distribute flashlights in three locations: entrance, bedroom, and car.
- ✅ Check charging and illumination once a year (before the rainy season).
- ✅ Ensure all family members know the location of the flashlights.
