Hi ivon,why not check out the giabt cfl bulbs you can get,perfect for autos,add a timer & make a carbon filter with Ona gel or activated carbon,built into 6in piping,with green scourer to filter out dust,drill lots if holes in pipe,block one end or same way but small amount of ona gel.Throw any smell at it! The bulbs have two sides,one half of bulb in blue spectrum & red in other,the auto takes whats needed when needed,comes in 125w or 300w or more,125w is fine for one plant or clones & 300w is fine for 1+ plants.The bulbs are cheap to run,no heat problems & just one bulb instead of many 40w bulbs.Depends where u live but if in uk message me & i'll let you know.You can get fan cooled shades,twin bulb shade & holders for 2 300w bulbs.Rememember to wipe fingerprints off from bulb after fixing as greasy prints left will heat bulb & go bang.I found out.