I haven't used tubes (or any type of fluorescents) for anything more than trying to fill in a shadowed area in an overly-full grow room or for light-duty vegging for years. I'll use the reptile bulbs for UV supplementation, though. I'm basically an HPS guy these days, although I used to use both HPS and MH (in various mixtures) for both vegetative and flowering phases. There's a big (/
heavy, lol) LED panel in there now, and it does seem to be adequate for the task. But high-powered, high-quality LED grow light panels are pretty expensive, and (most of) the cheap ones aren't exactly high-powered or high-quality. And almost none of them come with 6" or 8" duct flanges so that the grower can hook them up to a
separate ventilation run :icon_roll . Sure, you'll save a little money each month on the electric bill if you choose one that has less power consumption than the HIDs - but why would you do that, lol? I mean... If your electrical capacity allows you to run 400, 600, 1000, or 32,000 watts of HID, why wouldn't you want to run the SAME amount of LED (and I'm talking actual wattages here, not the marketing-departments' theoretical maximum of what a bunch of (for example) five-watt "class" would consume if they ever actually tried running five watts through each and every little LED in the panel (which would pretty much smoke the things approximately 1,000,000 out of 1,000,000 times it was tried :rolleyes3 ). Anyway, lol, where was I? Ranting. No, wait... If you can run a given amount of wattage, why not do so? If they're really better, then you'll end up with more bud. And, assuming that you DO run the same amount of wattage, you'll be producing the same amount of heat (since a watt of light in one's grow room is going to create approximately 3.413 BTUs per hour (250 watts creates ~853.25 BTU/hour, 600 watts creates 2,047.8 BTU/hr., et cetera) regardless of the type of lighting used. But even assuming there IS a monthly savings of electricity, how many months (years?) will it take to actually account for the price difference of the products to such an extent that there is an overall savings? And does a person expect to still be using the same LED product on that future date, lol? Because the technology is still much less mature than with HIDs, meaning that the products in the marketplace now might be eclipsed by something that comes out next year - or tomorrow afternoon.
So... I'm mostly a high-pressure sodium guy these days. They're pretty cheap. Many air-cooled reflectors are available which allow a person to segregate the heat produced by their lighting from the
smell produced by their plants, with all the benefits this provides. Sure, LEDs can last up to 50,000 hours
in theory, but a look at manufacturers' threads and how well (or not) they handle warranty repairs/replacements will quickly show that many of them... don't. OtOH, if I have a bulb failure at 3:00am, I can pick up a decent (good for emergency use at the very least) replacement bulb before 9:00am the same day locally. The old style C&C (aka "magnetic") ballasts could almost be used as a shield during a firefight, lol, and any local electrical supply house will carry components to quickly make repairs - and they're
cheap. The newer electronic ballasts are, I'm sure, somewhat more fragile... But I have dropped my Lumatek ballast <COUGH>once or twice<COUGH>, and it still works. I can also choose to run either a 400-watt HPS bulb (at 400 watts), a 400-watt MH bulb (at 400 watts), a 250-watt HPS bulb (at 250 watts), or a 250-watt MH bulb (at 250 watts). I can choose to overdrive a 250-watt bulb slightly (10%? It's enough to notice, but not enough to harm the bulbs), and do the same thing with the 400-watt ones. I can even
underdrive a 400-watt bulb at 250 watts. Although the cheap MH bulbs that I run might have a shortened life if I underdrive them by 150 watts. But still, lots of options.
And people can get HIDs (HPS especially) in many wattages, from as low as 70-watt all the way up to 1kW (and I've seen 1,500-watt HPS, but don't feel that they're very efficient for cannabis-growing purposes). I haven't personally used lower than 250-watt HID for years, but I've grown in an aluminum
trash can under a 70-watt HPS, so I know it's possible. I've used 150-watt HPS, and there are plenty of pictures here of what they can produce. So... Options. Cheap. Reliable.
I've got nothing against LEDs. In fact, I want to see something
great out of the industry. I want to see them become common enough that I can get a real powerhouse that
consumes, IDK, 600 watts, that has duct flanges, that I can get parts for locally, cheaply, and replace the parts in just a matter of minutes. And I want to see these future products available for the (future equivalent of)... A couple hundred dollars.
I just don't really see that yet. So... I'm mostly a HPS guy these days
.