Hey guys, I was using a 400 W Metal Halide bulb for the first 4 weeks and when my Autos started to flower I changed to a 400 W Super High Pressure Sodium bulb. The MH bulb is a very intense white light. The HPS bulb is a very orange color of light. Both bulbs came in a kit along with the fixture. Is this the best combo for growing? My autos seem to be doing well but my photos are not yet flowering.
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What schedule of lighting are you using.
Photos need 12/12 to flower.
18/6 initially but when I switched bulbs I went to 12/12.
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They will when mature enough. Autos can flower as early as 3 weeks
Photos may take 5 to 8 sometimes more before they are mature enough to flower. Plus it will take 10 to 14 days to see buds once you flip a mature plant to 12/12.
If you hold on they will come along in due time.
Make sure you have complete darkness.
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@Mancat Iām with @Spiney_norman 
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This question is loaded. In the past, yeah probably. I think LED lights have made the hps/mh bulbs obsolete. The old bulbs create a ton more heat, use potentially 100ās of watts more energy to run and the bulbs themselves are not only delecate as a ballerina but cost more then a vegas call girl.
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