G13 T8 24W SubstiTUBE Basic LED tube bulb With conventional bulbs, many operating hours always meant high costs. Both in terms of time and money. This is because they have to be regularly purchased, maintained, i.e. replaced and supplied with expensive energy. Das is a cost factor, especially in places with high lighting requirements, and should not be neglected, which is why it makes sense to look for an energy-saving lighting solution that requires less effort and costs because it works more efficiently. And this is precisely why the G13 T8 21W-24W SubstiTUBE Basic LED tube bulb was developed. It replaces conventional T8 fluorescent bulbs with LED technology and saves 68% of the energy previously used. This means that the purchase price is amortised within a short period of time. Full light output without switching delay is the major advantage of LED technology compared to compact fluorescent bulbs. But there's more - the service life of approx. 40,000 hours is just as impressive. The T8 fluorescent tube can be replaced with the G13 T8 21W-24W SubstiTUBE Basic LED tube bulb in no time at all. Please note, however, that the LED tube bulb must be rewired if it is to be installed in series.