I have other grow lights that work just fine. Go with another brand.

The settings (hi med low) allow for different levels of light for different growing purposes. They are bright and certainly work for the plants to grow.

These are a great substitute. As you can see the strip is for 2. Ordered 3 more. Would recommend these.

Do not use this for growing seedlings. At 6 inches, on the brightest setting, it only puts out between 50-60 foot candles. Foot-candle output diminishes greatly more than an inch from the light. Light hangs down touching plants.