Ushio HiLUX GRO HPS 600W opti-red Bulb

This bulb would fire then only come on part way then go dark and repeat process.Not sellers fault, just how they go sometimes

plants responded very quick to the improved light source. i would buy this lamp again. and would recommend it to anyone

Seem to be working great, will buy more in future

I've run other highly recommended bulbs in the past and had to spend much more than the Ushio's. I have found not only did the Ushio easily match the pricier bulb, it exceeded it in plant growth and yield.

Great bulb! Hands down best

nice color spectrum,great bulbs

Bulb is hot, I had tent running 630W with a 1000W MH bulb, I was convinced (correctly) to use bulb at correct wattage and did see black spotting on arc tube. Running this bulb at 600W to 630W, moreover, this bulb is keeping tent 2-3 deg warmer. Light is awesome, I had to raise my lights due to its intensity. This bulb is much brighter then my MH bulb at same wattage.

Glad I was able to get this off amazon.Works great with my lumatek.These bulbs aew said to be top of the line. This is my bulb of choice.