Reply to Jojodancer10 yes exchange it for the Sun Pulse it's the bulb to buy, and when the selection is rated by Kelvins it has always been 3000K that is best for cannabis flowering. Now all other bulbs list at 2100K which is HPS. But also Sun Pulse has always been the first bulb rated for electronic ballast and all other bulbs would burn out or go dim way before there rated life expectancy. Also here is the email I received from Sun Pulse just to clarify why they have always been better and the others have always been the others.
The Kelvin scale is a measurement for the human eye, like the lumen. We use it as a marketing reference so customers know which lamp to buy. HPS lamps have no UV. SunPulse lamps have UVA, B and part of C. HPS light is the worst light ever made for plants and is only 19-22% of the natural Sun.The 3k is popular for flowering and HPS replacement. I know you'll see the differences right away.Let me know if you have any other questions.Best,DanSunPulse