Good quality LED light has long lifespan, at least around 100000 hours, HPS or HID around 15000 hours.
LED always equiped with self-cooling cases or fans, so your plants are not exposed to be burned. HPS produce plethora heat, you need to be always more careful and use more fans or ventilation systems.
The cost for LED lights is more expensive than HPS lights as we all know. However, the electricity charges and the replacement charges that we spend for HPS are enough to buy a LED.
The plant growth rate of led grow light is faster than HPS, many studies have shown that LED grow light is a superior technology, when it comes to plants grow better and faster.
Another recent study of tomatoes in greenhouses revealed that for this setting, energy consumption can be decreased by up to 70% when compared to HPS technology.
Plantled Grow Lights are 100% recyclable and do not contain toxic substances, such as mercury. The RoHS certification is a must for every quality LED Grow Light.