The term "strong microwave" is subjective and not a standard measurement used in the context of microwave ovens. Microwave ovens are typically categorized based on their power output, which is measured in watts (W). Microwave ovens can have a wide range of power levels, from around 600 watts for lower-end models to over 1,200 watts for higher-end and more powerful ones.
A microwave with a power output of 800 to 1,200 watts is considered to be in the mid to high range and is generally considered strong enough for most cooking tasks. Higher wattage microwaves can cook food faster and more evenly, but the appropriate power level depends on your cooking needs and preferences.
When shopping for a microwave, you can usually find the power output listed on the product label or in the specifications section. Keep in mind that higher wattage microwaves may also be larger and more expensive, so it's essential to choose one that fits your needs and budget.